5-[1-(2-Ethoxycarbonyl-ethyl)-piperidin-4-ylidene]-5,11-dihydro-10-oxa-4-aza-dibenzo[a,d]cycloheptene-7-carboxylic acid methyl ester 在
sodium hydroxide 作用下,
以
甲醇 为溶剂,
以56%的产率得到5-[1-(2-Carboxy-ethyl)-piperidin-4-ylidene]-5,11-dihydro-10-oxa-4-aza-dibenzo[a,d]cycloheptene-7-carboxylic acid