英文别名Tadalafil Impurity 9; 1H-Pyrido[3,4-b]indole-3-carboxylic acid,1-(1,3-benzodioxol-5-yl)-2-(chloroacetyl)-2,3,4,9-tetrahydro-, methyl ester, (1R,3S)-; Tadalafil Impurity 67; methyl (1R,3S)-1-(benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indole-3-carboxylate 
