13-acetoxy-4-tetrahydropyranyloxymethyl-3,4-seco-20-nor-16-epi-gibberell-2-en-7-oic acid 19,10-lactone 7-methyl ester 在
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
以94%的产率得到13-acetoxy-4-hydroxymethyl-3,4-seco-20-nor-16-epi-gibberell-2-en-7-oic acid 19,10-lactone 7-methyl ester