PROBLEM TO BE SOLVED: To provide a compound having a TGF-bII receptor inhibitory action.SOLUTION: The diphenylmethyl piperazine derivative is represented by general formula (1) (wherein X and Y are each methylene, a nitrogen atom, a sulfur atom or a case in which no atom exists R1 is a hydrogen atom, alkyl or alkenyl which may be substituted with a hydrogen atom or carbon atom R2 is a halogen atom, amino or hydrazinyl and R3 is a 5-18C aromatic group which may contain a substituent).COPYRIGHT: (C)2010,JPO&INPIT【課題】TGF-bII型受容体抑制作用を有する化合物の提供。【解決手段】一般式(1)に表されるジフェニルメチルピペラジン誘導体。【選択図】なし