PROBLEM TO BE SOLVED: To provide a pharmaceutical composition for therapy or prophylaxis of diseases such as obesity comprising a new compound contained in a leaf of Eucommia ulmoides oliver.SOLUTION: The pharmaceutical composition comprises a compound represented by formula (I) (wherein, R1 to R4 and R11 to R14 represent each a specific substituent) or a salt thereof.COPYRIGHT: (C)2008,JPO&INPIT【課題】杜仲葉含有の新規化合物を含む肥満等の疾患の治療や予防用医薬組成物の提供。【解決手段】式(I)(式中、R1~R4、R11~R14は特定の置換基を表す。)の化合物、またはその塩。【選択図】なし