Carbonic acid benzyl ester (3S,8R,9S,10R,13S,14S,17S)-3-(tert-butyl-dimethyl-silanyloxy)-10,13-dimethyl-17-(1-methyl-2,2-bis-phenylsulfanyl-ethyl)-16-oxo-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl ester
2,2-Bis(benzyloxycarbonyloxy)-5,5-dimethyl-1,3-cyclohexandion
2,2-bis-benzyloxycarbonyloxy-5,5-dimethyl-3-morpholin-4-yl-cyclohex-3-enone
2,6-Bis(benzyloxycarbonyloxy)-4,4-dimethyl-2,5-cyclohexadien-1-on
trans-5-<<2-(acetyloxy)cyclohexyl>carbonyl>-2,2-dimethyl-4,6-dioxo-1,3-dioxan-5-yl phenylmethyl carbonate