Paclitaxel - Impurity R

158948-96-0

Taxol E; Benzenepropanoic acid, α-hydroxy-β-[[(2S)-2-methyl-1-oxobutyl]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, (αR,βS); (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 sec-Butyl Analog; Paclitaxel 2'',3''-Dihydrocephalomannine; (2aR,4S,4aS,6R,9S,11S,12S,12aR,12bS)-12-(Benzoyloxy)-4,11-dihydroxy-9-{[(2R,3S)-2-hydroxy-3-(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 (USP);