英文别名Methotrexate 1-methyl ester; Methotrexate related compound I [USP]; L-Glutamic acid,N-(4-(((2,4-diamino-6-pteridinyl)methyl)methylamino)benzoyl)-,1-methyl ester; (4S)-4-((4-(((2,4-Diaminopteridin-6-yl)methyl)methylamino)benzoyl)amino)-5-methoxy-5-oxopentanoic acid; Methotrexate related compound I; Methotrexate specified impurity I [EP]; Methotrexate alpha-Methyl Ester; Methotrexate α-Methyl Ester