DL-Glutamic acid, N-[4-[[(2,4-diamino-6-quinazolinyl)methyl]amino]benzoyl]-2-methyl- DL-Glutamic acid, N-[4-[[(2,4-diamino-6-quinazolinyl)methyl]amino]benzoyl]-2-methyl-, hydrate (4:7) NSC184691