31823-54-8 54-62-6 7551-06-6 Aminopterin sodium Aminopterina sodica [INN-Spanish] Aminopterine sodique [INN-French] Aminopterinum natricum [INN-Latin] L-Glutamic acid, N-(4-(((2,4-diamino-6-pteridinyl)methyl)amino)benzoyl)-, sodium salt Sodium aminopterin