PROBLEM TO BE SOLVED: To provide a method for producing a compound having cis stereoconfiguration and represented by formula I, and an optically active form thereof.SOLUTION: Production, recovery and conversion of a diastereomer salt of the compound are provided.COPYRIGHT: (C)2012,JPO&INPIT【課題】cis立体配置の式I〔式中、R1、R2、R3は特定の基〕の化合物及びその光学活性体の製造方法の提供。【解決手段】当該化合物のジアステレオマー塩の製造、回収および変換。【選択図】なし