英文别名(1S,3R)-1-(1,3-Benzodioxol-5-yl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylic Acid Methyl Ester; Tadalafil Impuirty Ⅵ; Tadalafil impurity 18; Tadanafil impurities 7; Tadalafil Related Impuirty 7; 1H-Pyrido[3,4-b]indole-3-carboxylic acid, 1-(1,3-benzodioxol-5-yl)-2,3,4,9-tetrahydro-, methyl ester, (1S,3R)-; Tadalafil intermediate I diastereomer 1 
