PROBLEM TO BE SOLVED: To provide a new appetite inhibitor or anti-obesity agent.SOLUTION: A compound as an amine derivative having a sulfonyl group and represented by either one of chemical formulae, a pharmaceutically acceptable salt or solvate thereof, is provided. The appetite inhibitor or anti-obesity agent including the compound, a pharmaceutically acceptable salt thereof or a solvate thereof, is also provided. In the appetite inhibitor or anti-obesity agent, the compound has NPY Y5 receptor antagonism.COPYRIGHT: (C)2011,JPO&INPIT【課題】新規食欲抑制剤または抗肥満薬の提供。【解決手段】スルホニル基を有するアミン誘導体である化合物、それらの製薬上許容される塩またはそれらの溶媒和物を含有する食欲抑制剤または抗肥満薬。化合物はNPY Y5受容体拮抗作用を有する。【選択図】なし