(1S,4S,7R,9S,10S,12R)-4,12-bis(acetyloxy)-1,9-dihydroxy-15-{[2-hydroxy-3-(4-hydroxyphenyl)-3-(phenylformamido)propanoyl]oxy}-10,14,17,17-tetramethyl-11-oxo-6-oxatetracyclo[11.3.1.0^{3,10}.0^{4,7}]hept

[2ar-[2aα,4β,4aβ,6β,9α(αr*,βs*),11α,12α,12aα,12bα]]-β-(benzoylamino)-α,4-dihydroxy-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-4-oxo-7,11-methano-1h-cyclodeca[3,4]benz[1,2-b]oxet-9-yl ester ; p-3'-hydroxypaclitaxel standard ; benzenepropanoic acid, b-(benzoylamino)-a,4-dihydroxy-,(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-ylester, (ar,bs)- ; 3'-para-hydroxypaclitaxel ; 3'-p-hydroxypaclitaxel ; benzenepropanoicacid, b-(benzoylamino)-a,4-dihydroxy-,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-4-oxo-7,11-methano-1h-cyclodeca[3,4]benz[1,2-b]oxet-9-ylester, [2ar-[2aa,4b,4ab,6b,9a(ar*,bs*),11a,12a,12aa,12ba]]- ; 3'-p-hydroxy paclitaxel