(3E,5E)-(R)-8-((1R,2R,4aS,8aS)-1-Hydroxy-2,5,5,8a-tetramethyl-decahydro-naphthalen-1-yl)-2,6-dimethyl-octa-3,5-dienoic acid methyl ester 在
硫酸 、
水 作用下,
以65%的产率得到(3E,5E)-(R)-2,6-Dimethyl-8-((4aS,8aS)-2,5,5,8a-tetramethyl-3,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-octa-3,5-dienoic acid methyl ester