(3R,4R,5S,8R,9R,10R,13R,14R,15S)-4-(2-Hydroxy-ethyl)-3,15-diisopropyl-4,9,10,13-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-3-ol 、
碘甲烷 在
silver(l) oxide 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 (3R,4R,5S,8R,9R,10R,13R,14R,15S)-3,15-Diisopropyl-4-(2-methoxy-ethyl)-4,9,10,13-tetramethyl-hexadecahydro-cyclopenta[a]phenanthren-3-ol