(1aR,4R,5aS,8S,8aS,10aR)-4,8,10a-Trimethyl-octahydro-1,6-dioxa-cyclopenta[a]cyclopropa[e]cyclodecene-5,7-dione 在
sodium tetrahydroborate 作用下,
生成 (1aR,4R,5R,5aS,8S,8aS,10aR)-5-Hydroxy-4,8,10a-trimethyl-decahydro-1,6-dioxa-cyclopenta[a]cyclopropa[e]cyclodecen-7-one