Chemical structure names: | ![](https://webarchive.library.unt.edu/eot2008/20090115002727im_/http://www.cancer.gov/images/spacer.gif) | - [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
- 5beta,20-epoxy-1,2alpha,4,7beta,10beta,13alpha-hexahydroxytax-11-en-9-one, 4,10-diacetate 2-benzoate 13-ester with (2R,3S)-N-benzoyl-3-phenylisoserine
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