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