PROBLEM TO BE SOLVED: To provide a hair growth inhibitor.SOLUTION: The hair growth inhibitor comprises a compound represented by formula (I) (wherein either one of R1 and R2 is hydrogen and the other is methoxy) or its salt as an active constituent.COPYRIGHT: (C)2012,JPO&INPIT【課題】毛成長抑制剤の提供。【解決手段】下記式(I)(式中、R1及びR2はいずれか一方が水素であり他方がメトキシである)で表される化合物、又はその塩を有効成分として含有する毛成長抑制剤。【選択図】なし