(S)-3-[(R)-1-((1aR,3aR,3bS,5aR,6R,8aS,8bS,10R,10aR)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-ethyl]-2-methyl-pent-4-enoic acid ethyl ester 在
sodium tetrahydroborate 、
臭氧 作用下,
生成 (S)-4-[(S)-1-((1aR,3aR,3bS,5aR,6R,8aS,8bS,10R,10aR)-10-Methoxy-3a,5a-dimethyl-hexadecahydro-cyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)-ethyl]-3-methyl-dihydro-furan-2-one