(R)-1-(3-Isopropyl-4,5-dihydro-isoxazol-5-yl)-1-((1aR,3aR,3bS,5aS,6S,8aS,8bS,10R,10aR)-10-methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-ethanol 在
dimsyl sodium 作用下,
以
二甲基亚砜 为溶剂,
以71%的产率得到E-(20S)-24-hydroximino-6β-methoxy-3α,5-cyclo-5α-cholest-5,22-dien-20-ol