甲氨蝶呤-γ-单酰胺

甲氨蝶呤-gamma-天冬氨酸

2-[[4-[(2,4-diaminopteridin-6-yl)methyl-methylamino]benzoyl]amino]-5-oxo-5-(pentylamino)pentanoic acid

甲氨蝶呤-gamma-二甲基酰胺

5-(benzylamino)-2-[[4-[(2,4-diaminopteridin-6-yl)methyl-methylamino]benzoyl]amino]-5-oxopentanoic acid