Compounds represented by general formula (1) which are phenethylamine derivatives exhibiting a motilin receptor antagonism etc. and being useful as drugs, wherein A represents an amino acid residue, etc.; R1 represents R6 -CO-, etc.; R2 represents hydrogen, etc.; R3 represents -CO-R7 , etc.; R4 represents alkyl, etc.; R5 represents hydroxy, etc.; R6 represents alkyl, etc ; and R7 represents amino, etc.
由通式(1)代表的化合物,是表现出动素受体拮抗作用等并可作为药物使用的苯
乙胺衍
生物,其中A代表
氨基酸残基等;R1代表R6-CO-等;R2代表氢等;R3代表-CO-R7等;R4代表烷基等;R5代表羟基等;R6代表烷基等;R7代表
氨基等。