(+)-3-(tert-butyldimethylsilyloxy)-17(Z)-ethylidene-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene

(+)-3-(tert-butyldimethylsilyloxy)-17-(2-hydroxy-1-methylethyl)-13-methyl-7,8,9,11,12,13,14,15,-octahydro-6H-cyclopenta[a]phenanthrene

tertiary butyldimethylsilyloxy estrone

(+)-2-[3-(tert-butyldimethylsilyloxy)-13-methyl-7,8,9,11,12,13,14,15,-octahydro-6H-cyclopenta[a]phenanthren-17-yl]-6-methylheptan-3-one 3-ethylene ketal

(+)-2-[3-(tert-butyldimethylsilyloxy)-13-methyl-7,8,9,11,12,13,14,15,-octahydro-6H-cyclopenta[a]phenanthren-17-yl]-6-methylheptan-3-one