paclitaxel
[2aR-[2a alpha,4beta,4a beta,6beta,9alpha(alphaR*,betaS*),-11alpha,12alpha,12a alpha,12b alpha]]-beta-(benzoylamino)-alpha-hydroxybenzene-propanoic acid 6,12b-bis(acetyloxy)-12-(benzoyloxy)-1a,33,4,-41,5,6,9,10,11,12,12a,12b-dodecahydro-4,11-dihydroxy-41,8,-12,13-tetramethyl-5-oxo-7,11-methano-1H-cyclodeca[3,4]benz[1,2-b]oxet-9-yl ester