2-(1,1-dimethylheptyl)-4-hydroxy-5,6,7,8,9,9a-hexahydro-4bH-10-oxa-benzo[a]azulen-5-carboxylic acid methyl ester 在
sodium hydroxide 作用下,
以
甲醇 、
水 为溶剂,
以93%的产率得到2-(1,1-dimethylheptyl)-4-hydroxy-5,6,7,8,9,9a-hexahydro-4bH-10-oxa-benzo[a]azulen-5-carboxylic acid