L-Glutamic acid, N-[[4-[[(2,4-diamino-6-pteridinyl)methyl]methylamino]-1-naphthalenyl]carbonyl]- L-Glutamic acid, N-[[4-[[(2,4-diamino-6-pteridinyl)methyl]methylamino]-1-naphthalenyl]carbonyl]-, hydrate (4:3) N-[[4-[[(2,4-DIAMINO-6-PTERIDINYL)METHYL]METHYLAMINO]-1-NAPHTHALENYL]CARBONYL]-L-GLUTAMIC ACID, HYDRATE (4:3) NSC174121