(20R,22R)-3β-t-butyldimethylsilyloxy-1α,20-dihydroxywitha-5,24-dienolide

(20R,22R)-3β-t-butyldimethylsilyloxy-5α,6α-epoxy-20-hydroxy-1-oxowith-24-enolide

(20R,22R)-20-dihydroxy-6β-phenylthio-1-oxowitha-2,4,24-trienolide

(S)-1-((1S,3R,8S,9S,10R,13S,14S,17S)-1,3-Bis-methoxymethoxy-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)-1-[1,3]dithian-2-yl-ethanol