2-((3R,3aR,5R,8aR)-3-Hydroxy-3,8-dimethyl-6-oxo-1,2,3,3a,4,5,6,8a-octahydro-azulen-5-yl)-acrylic acid methyl ester 在
sodium tetrahydroborate 作用下,
生成
2-((3R,3aR,5R,6S,8aR)-3,6-Dihydroxy-3,8-dimethyl-1,2,3,3a,4,5,6,8a-octahydro-azulen-5-yl)-acrylic acid methyl ester