(3S,3'aR,4'aS,8'aR,9'aR)-3,8'a-dimethyl-5'-methylidenespiro[3,4-dihydropyrazole-5,3'-3a,4,4a,6,7,8,9,9a-octahydrobenzo[f][1]benzofuran]-2'-one 反应 0.17h,
生成 、
、 、 (2'R,3aR,4aS,8aR,9aR)-2',8a-dimethyl-5-methylidenespiro[3a,4,4a,6,7,8,9,9a-octahydrobenzo[f][1]benzofuran-3,1'-cyclopropane]-2-one