(3β,5α,20S)-3-(1-ethoxyethoxy)-20-<(1-ethoxyethoxy)methyl>pregn-8(14)en-15-one 、
碘甲烷 在
potassium tert-butylate 作用下,
生成 (3S,5S,9R,10S,13R,14R,17R)-3-(2-Ethoxy-ethoxy)-17-[(S)-2-(2-ethoxy-ethoxy)-1-methyl-ethyl]-10,13,14-trimethyl-1,2,3,4,5,6,9,10,11,12,13,14,16,17-tetradecahydro-cyclopenta[a]phenanthren-15-one