[(3aR,5S,6aR,7aS,8R,11aS,11bR,11cR)-3-(tert-Butyl-dimethyl-silanyloxy)-5-ethoxy-8,11a-dimethyl-1,4,5,6a,7,7a,8,11,11a,11b-decahydro-3aH-6-oxa-benzo[de]anthracen-11c-yl]-methanol

(4R,5S,7R,8R,9R,10S,12S,14R,16S)-20-(Methanesulfonyl)-16-ethoxy-13-oxo-12-(phenylseleno)-21-norpicras-2-ene

(1R,4aS,4bR,8aS,9R,10aS)-8aβ-<(Benzyloxy)methyl>-1,4,4a,4b,5,6,7,8,8a,9,10,10a-dodecahydro-9α-hydroxy-1α,4aβ-dimethylphenanthren-7-one

(4R,5S,7R,8R,9R,10S,13R,14R,16S)-13,20-Epoxy-16-ethoxy-21-nitrilopicrasa-2,11-diene

(4R,5S,7R,8R,9R,10S,12R,13S,14R,16S)-13,20-Epoxy-16-ethoxy-12-hydroxy-11-oxopicras-2-en-21-oic acid methyl ester