18921-68-1 CB 3702 Deazaaminopterin Deazaminopterin Glutamic acid, N-(p-(((2,4-diamino-6-quinazolinyl)methyl)amino)benzoyl)-, L- L-Glutamic acid, N-(4-(((2,4-diamino-6-quinazolinyl)methyl)amino)benzoyl)- L-N-(p-(((2,4-Diamino-6-quinazolinyl)methyl)amino)benzoyl)glutamic acid NCS 529860 NSC 529860