(E)-acetaldoxime 、 (1aS,3aR,3bS,5aS,6R,8aS,8bS,10R,10aR)-6-Isopropenyl-10-methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene 在
吡啶 、
N-氯代丁二酰亚胺 作用下,
生成
6β-metoxy-3α,5-cyclo-17-<5R-(3,5-dimethyl-2-isoxazolin-5-yl)>-5α-androstane 、 6β-metoxy-3α,5-cyclo-17-<5S-(3,5-dimethyl-2-isoxazolin-5-yl)>-5α-androstane