英文别名(R)-Methyl 2-(2-chloroacetamido)-3-(1H-indol-3-yl)propanoate; Tadalafil Impurity 41; Methyl Tryptophan Impurity 1; Tadalafil Impurity 38; Tadalafil Impurity 26; N-(Chloroacetyl)-D-tryptophan methyl ester; D-Tryptophan, N-(chloroacetyl)-, methyl ester; Intermediate impurity E 
