Impurity Reference Standard - Products

Paclitaxel

CAT No: CL-PCTX-01 CAS No: 33069-62-4 Mol Wt: 853.9 Mol F: C47H51NO14 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-12-(benzoyloxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

Paclitaxel Photodegradant

CAT No: CL-PCTX-02 CAS No: 146139-03-9 Mol Wt: 853.9 Mol F: C47H51NO14 Inv Status: Custom Synthesis

Chemical Name: (1S,2S,4S,5S,5aR,6R,7aS,8S,9aR,11aS,11bR)-4-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-1-(benzoyloxy)-2,8-dihydroxy-5,7a,12,12-tetramethyl-7-oxodecahydro-1H-2,5a-methanocyclohepta[3,3a]indeno[5,4-b]oxete-6,11a(11H)-diyl diacetate

Paclitaxel EP Impurity C

CAT No: CL-PCTX-03 CAS No: 153415-45-3 Mol Wt: 847.9 Mol F: C46H57NO14 Inv Status: Custom Synthesis

Chemical Name: N-Debenzoyl-N-hexanoylpaclitaxel ; N-Debenzoyl-N-hexanoylpaclitaxel; (4,10?-bis(acetyloxy)-13a-[[(2R,3S)-3-(hexanoylamino)-2-hydroxy-3-phenylpropanoyl]oxy]-1,7?-dihydroxy-9-oxo-5?,20-epoxytax-11-en-2a-yl benzoate (N-debenzoyl-N-hexanoylpaclitaxel

Paclitaxel Succinate

CAT No: CL-PCTX-04 CAS No: 117527-50-1 Mol Wt: 954 Mol F: C51H55NO17 Inv Status: Custom Synthesis

Chemical Name: [2aR-[2aa,4?,4a?,6?,9a(1R*,2S*),11a,12a,12aa,12ba]]-Mono[2-(benzoylamino)-1-[[[6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl]oxy]carbonyl]-2-phenylethyl] Ester Butanedioic Acid; Mono[(1R,2S)-2-(benzoylamino)-1-[[[(2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl]oxy]carbonyl]-2-phenylethyl] Ester Butanedioic Acid

10-Acetoacetyl 2

CAT No: CL-PCTX-05 CAS No: 2757197-25-2 Mol Wt: 1124.5 Mol F: C61H81NO15Si2 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-acetoxy-9-(((2R,3S)-3-benzamido-3-phenyl-2-((triethylsilyl)oxy)propanoyl)oxy)-11-hydroxy-4a,8,13,13-tetramethyl-5-oxo-6-((3-oxobutanoyl)oxy)-4-((triethylsilyl)oxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl benzoate

Paclitaxel EP Impurity E

CAT No: CL-PCTX-06 CAS No: 105454-04-4 Mol Wt: 853.9 Mol F: C47H51NO14 Inv Status: Custom Synthesis

Chemical Name: 4,10?-bis(acetyloxy)-13a-[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1,7a-dihydroxy-9-oxo-5?,20-epoxytax-11-en-2a-yl benzoate

7-Acetyl Paclitaxel Trichloroethyl Ester

CAT No: CL-PCTX-08 CAS No: 173101-47-8 Mol Wt: 777.9 Mol F: C42H51NO13 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-Acetoxy-9-(((2R,3S)-3-butyramido-2-hydroxy-3-phenylpropanoyl)oxy)-4,6,11-trihydroxy-4a,8,13,13-tetramethyl-5-oxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl Benzoate; 10-Deacetyl-3?ebenzoyl-3?utanoylpaclitaxel

Paclitaxel EP Impurity I

CAT No: CL-PCTX-09 CAS No: 2157462-42-3 Mol Wt: 1079.2 Mol F: C61H62N2O16 Inv Status: Custom Synthesis

Chemical Name: 4-(acetyloxy)-10?,13a-bis[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1,7?-dihydroxy-9-oxo-5?,20-epoxytax-11-en-2a-yl benzoate (10-O-[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]-10-O-deacetylpaclitaxel)

Paclitaxel EP Impurity G

CAT No: CL-PCTX-22 CAS No: 78432-77-6 Mol Wt: 811.9 Mol F: C45H49NO13 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-acetoxy-9-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-4,6,11-trihydroxy-4a,8,13,13-tetramethyl-5-oxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl benzoate

Paclitaxel EP Impurity L

CAT No: CL-PCTX-24 CAS No: 92950-39-5 Mol Wt: 896 Mol F: C49H53NO15 Inv Status: Custom Synthesis

Chemical Name: 4,7?,10?-tris(acetyloxy)-13a-[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1-hydroxy-9-oxo-5?,20-epoxytax-11-en-2a-yl benzoate (7-O-acetylpaclitaxel),

N-Debenzoyl-N-Propanoyl-10-Deacetylpaclitaxel

CAT No: CL-PCTX-25 CAS No: 173101-59-2 Mol Wt: 763.8 Mol F: C41H49NO13 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-Acetoxy-4,6,11-trihydroxy-9-(((2R,3S)-2-hydroxy-3-phenyl-3-propionamidopropanoyl)oxy)-4a,8,13,13-tetramethyl-5-oxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl Benzoate

10-Deacetyl-7-Xylosyl Paclitaxel

CAT No: CL-PCTX-26 CAS No: 90332-63-1 Mol Wt: 943.98 Mol F: C50H57NO17 Inv Status: Custom Synthesis

Chemical Name: 10-Deacetyl-7-xylosyl Paclitaxel

Paclitaxel EP Impurity Q

CAT No: CL-PCTX-27 CAS No: 502626-06-4 Mol Wt: 845.36 Mol F: C46H55NO14 Inv Status: Custom Synthesis

Chemical Name: N-Debenzoyl-N-[(3E)-hex-3-enoyl] Paclitaxel

2-Debenzoyl Paclitaxel 2-Pentanoate

CAT No: CL-PCTX-32 CAS No: 213767-22-7 Mol Wt: 833.9 Mol F: C45H55NO14 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-12-(pentanoyloxy)-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

N-Debenzoyl-7-{[(2,2,2,-Trichloroethyl)Oxy]Carbonyl} Paclitaxel

CAT No: CL-PCTX-33 CAS No: 114915-15-0 Mol Wt: 925.2 Mol F: C43H48Cl3NO15 Inv Status: Custom Synthesis

Chemical Name: N-Debenzoyl-7-[[(2,2,2-trichloroethoxy)carbonyl]oxy]taxol; Benzenepropanoic acid, ?-?amino-?a-?hydroxy-,(2aR,?4S,?4aS,?6R,?9S,?11S,?12S,?12aR,?12bS)?-?6,?12b-?bis(acetyloxy)?-?12-?(benzoyloxy)?-?2a,?3,?4,?4a,?5,?6,?9,?10,?11,?12,?12a,?12b-?dodecahydro-?11-?hydroxy-?4a,?8,?13,?13-?tetramethyl-?5-?oxo-?4-?[[(2,?2,?2-?trichloroethoxy)?carbonyl]?oxy]?-(2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3S)-3-amino-2-hydroxy-3-phenylpropanoyl)oxy)-12-(benzoyloxy)-11-hydroxy-4a,8,13,13-tetramethyl-5-oxo-4-(((2,2,2-trichloroethoxy)carbonyl)oxy)-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

N-Debenzoyl-3

CAT No: CL-PCTX-34 CAS No: NA Mol Wt: NA Mol F: NA Inv Status: Custom Synthesis

Chemical Name: NA

N-Debenzoylpaclitaxel 1-Oxopentyl Amino Ester

CAT No: CL-PCTX-35 CAS No: 173101-55-8 Mol Wt: 833.9 Mol F: C45H55NO14 Inv Status: Custom Synthesis

Chemical Name: (aR,?)-a-Hydroxy-?[(1-oxopentyl)amino]benzenepropanoic Acid (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-Bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl Ester; [2aR-[2aa,4?4a?6?9a(aR*,?*),11a,12a,12aa,12ba]]-a-Hydroxy-?[(1-oxopentyl)amino]benzenepropanoic Acid 6,12b-Bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl Ester; Benzenepropanoic acid, a-?hydroxy-???[(1-?oxopentyl)?amino]?-?, (2aR,?4S,?4aS,?6R,?9S,?11S,?12S,?12aR,?12bS)?-?6,?12b-?bis(acetyloxy)?-?12-?(benzoyloxy)?-?2a,?3,?4,?4a,?5,?6,?9,?10,?11,?12,?12a,?12b-?dodecahydro-?4,?11-?dihydroxy-?4a,?8,?13,?13-?tetramethyl-?5-?oxo-?7,?11-?methano-?1H-?cyclodeca[3,?4]?benz[1,?2-?b]?oxet-?9-?yl ester, (aR,??)?-; Benzenepropanoic acid, a-hydroxy-?[(1-oxopentyl)amino]-, 6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl ester, [2aR-[2aa,4?4a?6?9a(aR*,?*),11a,12a,12aa,12ba]]-; (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12-(benzoyloxy)-4,11-dihydroxy-9-(((2R,3S)-2-hydroxy-3-pentanamido-3-phenylpropanoyl)oxy)-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

4-Desacetyl-2-Debenzoyl-[2,4]-Oxol Paclitaxel

CAT No: CL-PCTX-39 CAS No: 159500-49-9 Mol Wt: 749.8 Mol F: C40H47NO13 Inv Status: Custom Synthesis

Chemical Name: (2aS,2a1R,3R,5S,5aS,7R,10S,12S,12aS)-10-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-3,5,12-trihydroxy-5a,9,13,13-tetramethyl-6-oxo-3,4,5,5a,6,7,10,11,12,12a-decahydro-2H-8,12-methanocyclodeca[cd]isobenzofuran-2a,7(2a1H)-diyl diacetate

Paclitaxel 13-Tes-Baccatin III

CAT No: CL-PCTX-40 CAS No: 208406-86-4 Mol Wt: 700.9 Mol F: C37H52O11Si Inv Status: Custom Synthesis

Chemical Name: (2aS,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12-(benzoyloxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-9-((triethylsilyl)oxy)-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

2-Debenzoyl Paclitaxel 2-Pentenoate

CAT No: CL-PCTX-41 CAS No: Mol Wt: 831.9 Mol F: C45H53NO14 Inv Status: Custom Synthesis

Chemical Name: (4S,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-12-(((E)-pent-2-enoyl)oxy)-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

10-Acetoacetyl Paclitaxel 2

CAT No: CL-PCTX-43 CAS No: Mol Wt: 895.94 Mol F: C49H53NO15 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12b-acetoxy-9-(((2R,3R)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-6-((3-oxobutanoyl)oxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl benzoate

6?-Hydroxy Paclitaxel

CAT No: CL-PCTX-44 CAS No: 153212-75-0 Mol Wt: 869.9 Mol F: C47H51NO15 Inv Status: Custom Synthesis

Chemical Name: (2aR,3S,4R,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3R)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-12-(benzoyloxy)-3,4,11-trihydroxy-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl (2aR,?3S,?4R,?4aS,?6R,?9S,?11S,?12S,?12aR,?12bS)?-?6,?12b-?bis(acetyloxy)?-?12-?(benzoyloxy)?-?2a,?3,?4,?4a,?5,?6,?9,?10,?11,?12,?12a,?12b-?dodecahydro-?3,?4,?11-?trihydroxy-?4a,?8,?13,?13-?tetramethyl-?5-?oxo-?7,?11-?methano-?1H-(2aR,3S,4R,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-12-(benzoyloxy)-3,4,11-trihydroxy-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

6?-Hydroxy Paclitaxel-D5

CAT No: CL-PCTX-45 CAS No: 1315376-90-9 Mol Wt: 874.9 Mol F: C47H46D5NO15 Inv Status: Custom Synthesis

Chemical Name: Benzenepropanoic acid, ?-?(benzoyl-?2,?3,?4,?5,?6-?d5-?amino)?-?a-?hydroxy-?, (2aR,?3S,?4R,?4aS,?6R,?9S,?11S,?12S,?12aR,?12bS)?-?6,?12b-?bis(acetyloxy)?-?12-?(benzoyloxy)?-?2a,?3,?4,?4a,?5,?6,?9,?10,?11,?12,?12a,?12b-?dodecahydro-?3,?4,?11-?trihydroxy-?4a,?8,?13,?13-?tetramethyl-?5-?oxo-?7,?11-?methano-?1H-?cyclodeca[3,?4]?benz[1,?2-?b]?oxet-?9-?yl ester, (aR,??S)?-; (2aR,3S,4R,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3S)-3-(benzamido-2,3,4,5,6-d5)-2-hydroxy-3-phenylpropanoyl)oxy)-12-(benzoyloxy)-3,4,11-trihydroxy-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

2-M-Hydroxy(Benzoyl) Paclitaxel

CAT No: CL-PCTX-47 CAS No: 132160-31-7 Mol Wt: 869.91 Mol F: C47H51NO15 Inv Status: Custom Synthesis

Chemical Name: 2-m-Hydroxy(benzoyl) Paclitaxel

Paclitaxel EP Impurity D

CAT No: CL-PCTX-48 CAS No: 150547-36-7 Mol Wt: 831.9 Mol F: C45H53NO14 Inv Status: Custom Synthesis

Chemical Name: 7-epi Cephalomannine ; N-Debenzoyl-N-tigloyl-7-epi-paclitaxel ;(2aR,4R,4aS,6R,9S,11S,12S,12aR,12bS)-12-(benzoyloxy)-4,11-dihydroxy-9-(((2R,3S)-2-hydroxy-3-((E)-2-methylbut-2-enamido)-3-phenylpropanoyl)oxy)-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

7,13-Bissidechainpaclitaxel

CAT No: CL-PCTX-49 CAS No: 376629-82-2 Mol Wt: 1121.2 Mol F: C63H64N2O17 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-diacetoxy-12-(benzoyloxy)-11-hydroxy-4a,8,13,13-tetramethyl-5-oxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-4,9-diyl (2R,2'R,3S,3'S)-bis(3-benzamido-2-hydroxy-3-phenylpropanoate)

Paclitaxel EP Impurity K

CAT No: CL-PCTX-58 CAS No: 148930-55-6 Mol Wt: 968.2 Mol F: C53H65NO14Si Inv Status: Custom Synthesis

Chemical Name: (aR,?S)-?-(Benzoylamino)-a-7-O-(Triethylsilyl) Paclitaxel ;hydroxy-benzenepropanoic Acid (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-Bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-11-hydroxy-4a,8,13,13-tetramethyl-5-oxo-4-[(triethylsilyl)oxy]-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl Ester; 7-O-(Triethylsilyl)paclitaxel; 7-O-(Triethylsilyl)taxol; (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3R)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-12-(benzoyloxy)-11-hydroxy-4a,8,13,13-tetramethyl-5-oxo-4-((triethylsilyl)oxy)-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

Paclitaxel EP Impurity N

CAT No: CL-PCTX-61 CAS No: 27548-93-2 Mol Wt: 586.6 Mol F: C31H38O11 Inv Status: Custom Synthesis

Chemical Name: 13-O-de[(2R,3S)-3-(benzoylamino)-2-hydroxy-3phenylpropanoyl]paclitaxel ;(2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-Bis(acetyloxy)-12-(benzoyloxy)-1,2a,3,4,4a,6,9,10,11,12,12a,12b-dodecahydro-4,9,11-trihydroxy-4a,8,13,13-tetramethyl-7,11-methano-5H-cyclodeca[3,4]benz[1,2-b]oxet-5-one

(1S,2S,3R,4R)-Rel-3-((Tert-Butoxycarbonyl)Amino)Bicyclo[2.2.1]Heptane-2-Carboxylic Acid

CAT No: CL-PCTX-84 CAS No: 1212306-15-4 Mol Wt: 255.31 Mol F: C13H21NO4 Inv Status: Custom Synthesis

Chemical Name: (1S,2S,3R,4R)-rel-3-((tert-Butoxycarbonyl)amino)bicyclo[2.2.1]heptane-2-carboxylic acid

(4S,5S)-3-Tert-Butoxycarbonyl-2-(4-Anisyl)-4-Phenyl-5-Oxazolidinecarboxylic Acid

CAT No: CL-PCTX-85 CAS No: 196404-55-4 Mol Wt: 399.4 Mol F: C22H25NO6 Inv Status: Custom Synthesis

Chemical Name: (4S,5R)-3-(tert-butoxycarbonyl)-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic acid

Carbonochloridic Acid 1,2,2,2-Tetrachloroethyl Ester

CAT No: CL-PCTX-86 CAS No: 98015-53-3 Mol Wt: 246.3 Mol F: C3HCl5O2 Inv Status: Custom Synthesis

Chemical Name: Carbonochloridic Acid 1,2,2,2-Tetrachloroethyl Ester

Paclitaxel EP Impurity B

CAT No: CL-PCTX-87 CAS No: 71610-00-9 Mol Wt: 831.9 Mol F: C45H53NO14 Inv Status: Custom Synthesis

Chemical Name: 4,10?-Bis(acetyloxy)-1,7?-dihydroxy-13a-[[(2R,3S)-2-hydroxy-3-[[(2E)-2-methylbut-2-enoyl]amino]-3-phenylpropanoyl]oxy]-9-oxo-5?,20-epoxytax-11-en-2a-yl benzoate

10-Deacetyl Baccatin III

CAT No: CL-PCTX-88 CAS No: 32981-86-5 Mol Wt: 544.6 Mol F: C29H36O10 Inv Status: Custom Synthesis

Chemical Name: 5?,20-epoxy-4-(acetyloxy)-1,7?,10?,13a-tetrahydroxy-9-oxotax-11-en-2a-yl benzoate

7-Epi-10-Deacetyl Baccatin III

CAT No: CL-PCTX-89 CAS No: 71629-92-0 Mol Wt: 544.6 Mol F: C29H36O10 Inv Status: Custom Synthesis

Chemical Name: (2aR,4R,4aS,6R,9S,11S,12S,12aR,12bS)-12b-acetoxy-4,6,9,11-tetrahydroxy-4a,8,13,13-tetramethyl-5-oxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl benzoate

Cabazitaxel EP Impurity B

CAT No: CL-PCTX-90 CAS No: NA Mol Wt: 849 Mol F: C46H59NO14 Inv Status: Custom Synthesis

Chemical Name: 13a-[[(2R,3S)-3-[(tert-butoxycarbonyl)amino]-2-hydroxy-3-phenylpropanoyl]oxy]-1-hydroxy-7?,10?-dimethoxy-9-oxo-4-(propanoyloxy)-5?,20-epoxytax-11-en-2a-yl benzoate

Paclitaxel EP Impurity R

CAT No: CL-PCTX-95 CAS No: 158948-96-0 Mol Wt: 833.9 Mol F: C45H55NO14 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12-(benzoyloxy)-4,11-dihydroxy-9-(((2R,3S)-2-hydroxy-3-((S)-2-methylbutanamido)-3-phenylpropanoyl)oxy)-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

Paclitaxel EP Impurity A

CAT No: CL-PCTX-115 CAS No: 173101-54-7 Mol Wt: 831.9 Mol F: C45H53NO14 Inv Status: Custom Synthesis

Chemical Name: 4,10?-bis(acetyloxy)-13a-[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1,7?-dihydroxy-9-oxo-5?,20-epoxytax-11-en-2a-yl (2E)-2-methylbut-2-enoate ; (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-9-{[(2R,3S)-3-Benzamido-2-hydroxy-3-phenylpropanoyl]oxy}-4,11-dihydroxy-4a,8,13,13-tetramethyl-12-{[(E)-2-methylbut-2-enoyl]oxy}-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate (as per USP)

Paclitaxel EP Impurity F

CAT No: CL-PCTX-117 CAS No: 153083-53-5 Mol Wt: 862 Mol F: C47H59NO14 Inv Status: Custom Synthesis

Chemical Name: (aR,??S)?-a-Hydroxy-??-?[methyl(1-?oxohexyl)?amino]?-?benzenepropanoic Acid (2aR,?4S,?4aS,?6R,?9S,?11S,?12S,?12aR,?12bS)?-?6,?12b-?bis(acetyloxy)?-?12-?(benzoyloxy)?-?2a,?3,?4,?4a,?5,?6,?9,?10,?11,?12,?12a,?12b-?dodecahydro-?4,?11-?dihydroxy-?4a,?8,?13,?13-?tetramethyl-?5-?oxo-?7,?11-?methano-?1H-?cyclodeca[3,?4]?benz[1,?2-?b]?oxet-?9-?yl Ester; [2aR-[2aa,4?,4a?,6?,9a(aR*,?S*),11a,12a,12aa,12ba]]-a-Hydroxy-?-[methyl(1-oxohexyl)amino]-benzenepropanoic acid 6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl Ester; 7,11-Methano-1H-cyclo

7-Epi-10-Oxo-10-Deacetyl Baccatin III

CAT No: CL-PCTX-119 CAS No: 151636-94-1 Mol Wt: 542.6 Mol F: C29H34O10 Inv Status: Custom Synthesis

Chemical Name: (2aR,4R,4aS,9S,11S,12S,12aR,12bS)-12b-(Acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,9,10,11,12,12a,12b-decahydro-4,9,11-trihydroxy-4a,8,13,13-tetramethyl-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxete-5,6-dione; 10-Deacetyl-10-oxo-baccatin V; 10-Dehydrobaccatin V; (2aR,4R,4aS,9S,11S,12S,12aR,12bS)-12b-acetoxy-4,9,11-trihydroxy-4a,8,13,13-tetramethyl-5,6-dioxo-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxet-12-yl benzoate

Paclitaxel EP Impurity P

CAT No: CL-PCTX-125 CAS No: 173101-56-9 Mol Wt: 867.9 Mol F: C48H53NO14 Inv Status: Custom Synthesis

Chemical Name: N-Debenzoyl-N-(phenylacetyl)paclitaxel ; (aR,?S)-a-Hydroxy-?-[(phenylacetyl)amino]benzenepropanoic Acid (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-6,12b-Bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl Ester; [2aR-[2aa,4?,4a?,6?,9a(aR*,?S*),11a,12a,12aa,12ba]]-a-Hydroxy-?-[(phenylacetyl)amino]benzenepropanoic Acid 6,12b-Bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl Ester; Paclitaxel Impurity P

Paclitaxel EP Impurity H

CAT No: CL-PCTX-129 CAS No: 78454-17-8 Mol Wt: 811.9 Mol F: C45H49NO13 Inv Status: Custom Synthesis

Chemical Name: 4-(acetyloxy)-13a-[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1,7a,10?-trihydroxy-9-oxo-5?,20-epoxytax-11-en-2a-yl benzoate

Vinyl Chloroformate

CAT No: CL-PCTX-140 CAS No: 5130-24-5 Mol Wt: 106.51 Mol F: C3H3ClO2 Inv Status: Custom Synthesis

Chemical Name: Vinyl Chloroformate

DHA-Paclitaxel

CAT No: CL-PCTX-142 CAS No: 199796-52-6 Mol Wt: 1164.4 Mol F: C69H81NO15 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-9-(((2R,3S)-3-benzamido-2-(((4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoyl)oxy)-3-phenylpropanoyl)oxy)-12-(benzoyloxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

6a,3?P-Dihydroxy Paclitaxel

CAT No: CL-PCTX-143 CAS No: 157230-10-9 Mol Wt: 885.9 Mol F: C47H51NO16 Inv Status: Custom Synthesis

Chemical Name: (aR,?)-?(Benzoylamino)-a,4-dihydroxybenzenepropanoic Acid 6,12b-Bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-3,4,11-trihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl Ester; Benzenepropanoic acid, ??(benzoylamino)?-?a,?4-?dihydroxy-?, (2aR,?3S,?4R,?4aS,?6R,?9S,?11S,?12S,?12aR,?12bS)?-?6,?12b-?bis(acetyloxy)?-?12-?(benzoyloxy)?-?2a,?3,?4,?4a,?5,?6,?9,?10,?11,?12,?12a,?12b-?dodecahydro-?3,?4,?11-?trihydroxy-?4a,?8,?13,?13-?tetramethyl-?5-?oxo-?7,?11-?methano-?1H-?cyclodeca[3,?4]?benz[1,?2-?b]?oxet-?9-?yl ester, (aR,??)?-; Benzenepropanoic acid, ?(benzoylamino)-a,4-dihydroxy-, 6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-3,4,11-trihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl ester, [2aR-[2aa,3a,4?4a?6?9a(aR*,?*),11a,12a,12aa,12ba]]- 7,11-Methano-1H-cyclodeca[3,4]benz[1,2-b]oxete, benzenepropanoic acid deriv. 6a,3'-p-Dihydroxypaclitaxel;

Paclitaxel Impurity 1

CAT No: CL-PCTX-144 CAS No: 206866-02-6 Mol Wt: 819.9 Mol F: C44H53NO14 Inv Status: Custom Synthesis

Chemical Name: Benzenepropanoic acid, a-?hydroxy-??-?[(2-?methyl-?1-?oxopropyl)?amino]?-?, (2aR,?4S,?4aS,?6R,?9S,?11S,?12S,?12aR,?12bS)?-?6,?12b-?bis(acetyloxy)?-?12-?(benzoyloxy)?-?2a,?3,?4,?4a,?5,?6,?9,?10,?11,?12,?12a,?12b-?dodecahydro-?4,?11-?dihydroxy-?4a,?8,?13,?13-?tetramethyl-?5-?oxo-?7,?11-?methano-?1H-?cyclodeca[3,?4]?benz[1,?2-?b]?oxet-?9-?yl ester, (aR,??S)?-; Benzenepropanoic acid, a-hydroxy-?-[(2-methyl-1-oxopropyl)amino]-, 6,12b-bis(acetyloxy)-12-(benzoyloxy)-2a,3,4,4a,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl ester, [2aR-[2aa,4?,4a?,6?,9a(aR*,?S*),11a,12a,12aa,12ba]]-; Canadensol

Paclitaxel Intermediate 2

CAT No: CL-PCTX-145 CAS No: 196404-55-4 Mol Wt: 399.4 Mol F: C22H25NO6 Inv Status: Custom Synthesis

Chemical Name: (4S,5R)-3-(tert-butoxycarbonyl)-2-(4-methoxyphenyl)-4-phenyloxazolidine-5-carboxylic acid

10,13-Bissidechain-Paclitaxel

CAT No: CL-PCTX-146 CAS No: 2157462-42-3 Mol Wt: 1079.2 Mol F: C61H62N2O16 Inv Status: Custom Synthesis

Chemical Name: 4-(acetyloxy)-10?,13a-bis[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1,7?-dihydroxy-9-oxo-5?,20-epoxytax-11-en-2a-yl benzoate (10-O-[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]-10-O-deacetylpaclitaxel)

Paclitaxel EP Impurity M

CAT No: CL-PCTX-147 CAS No: 932042-85-8 Mol Wt: 871.9 Mol F: C47H53NO15 Inv Status: Custom Synthesis

Chemical Name: 5a,10?-bis(acetyloxy)-13a-[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1,2a,4,7?-tetrahydroxy-9-oxotax-11-en-20-yl benzoate

Paclitaxel Impurity 2

CAT No: CL-PCTX-148 CAS No: 489459-83-8 Mol Wt: 871.9 Mol F: C47H53NO15 Inv Status: Custom Synthesis

Chemical Name: (1S,3S,4S,4aR,5S,6S,8S,11S,12aS)-8-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-5-(benzoyloxy)-1,4,6-trihydroxy-4-(hydroxymethyl)-9,12a,13,13-tetramethyl-12-oxo-1,2,3,4,4a,5,6,7,8,11,12,12a-dodecahydro-6,10-methanobenzo[10]annulene-3,11-diyl diacetate

Paclitaxel EP Impurity O

CAT No: CL-PCTX-149 CAS No: 219783-77-4 Mol Wt: 880 Mol F: C49H53NO14 Inv Status: Custom Synthesis

Chemical Name: (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12-(benzoyloxy)-9-(((2R,3S)-3-cinnamamido-2-hydroxy-3-phenylpropanoyl)oxy)-4,11-dihydroxy-4a,8,13,13-tetramethyl-5-oxo-3,4,4a,5,6,9,10,11,12,12a-decahydro-1H-7,11-methanocyclodeca[3,4]benzo[1,2-b]oxete-6,12b(2aH)-diyl diacetate

Paclitaxel EP Impurity J

CAT No: CL-PCTX-150 CAS No: 2757197-26-3 Mol Wt: 896 Mol F: C49H53NO15 Inv Status: Custom Synthesis

Chemical Name: 4-(acetyloxy)-13a-[[(2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl]oxy]-1,7?-dihydroxy-9-oxo-10?-[(3-oxobutanoyl)oxy]-5?,20-epoxytax-11-en-2a-yl benzoate (10-O-deacetyl-10-O-(3-oxobutanoyl)paclitaxel)

Paclitaxel Derivative C

CAT No: CL-PCTX-152 CAS No: 135393-42-9 Mol Wt: 871.9 Mol F: C47H53NO15 Inv Status: Custom Synthesis

Chemical Name: (1S,3S,4S,4aR,5S,6S,8S,11S,12aS)-11-acetoxy-4-(acetoxymethyl)-8-(((2R,3S)-3-benzamido-2-hydroxy-3-phenylpropanoyl)oxy)-1,3,4,6-tetrahydroxy-9,12a,13,13-tetramethyl-12-oxo-1,2,3,4,4a,5,6,7,8,11,12,12a-dodecahydro-6,10-methanobenzo[10]annulen-5-yl benzoate

Type:Impurity Reference Standard

API NAME:Paclitaxel

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