PROBLEM TO BE SOLVED: To provide a composition for inhibiting &alpha-glucosidase.SOLUTION: The composition for inhibiting &alpha-glucosidase contains a serotonin derivative represented by formula (I) as an active ingredient.COPYRIGHT: (C)2012,JPO&INPIT【課題】α-グルコシダーゼ阻害用組成物の提供【解決手段】下記式(I)で表されるセロトニン誘導体を有効成分として含む、α-グルコシダーゼ阻害用組成物。【選択図】なし