PROBLEM TO BE SOLVED: To provide a NK3 receptor antagonist that inhibits the propagation of animals without adverse effect on an ecological system.SOLUTION: The present invention provides a compound represented by formula (I) (R1 is H, a hydroxy group or the like R2 is a hydroxy group, a mercapto group or the like R3 is a phenyl group or naphthyl group).SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】生態系へ悪影響を及ぼさずに動物の繁殖抑制をするNK3受容体拮抗体の提供。【解決手段】式(I’)で表される化合物。(R1はH、水酸基等;R2は水酸基、メルカプト基等;R3はフェニル基又はナフチル基)【選択図】なし
