113857-87-7 Benzoic acid, 2-[[[4-carboxy-4-[[4-[[(2,4-diamino- 6-pteridinyl)methyl]amino]benzoyl]amino]butyl]amino]carbonyl L-Ornithine, N.alpha.-[4-[[(2,4-diamino-6-pteridinyl)methyl]amino]benzoyl]-N.delta.-(2-carboxybenzoyl)- N.ALPHA.-(4-AMINO-4-DEOXYLPTEROYL)-N.DELTA.-HEMIPHTHALOYL-L-ORNITHINE N.alpha.-(4-Amino-4-deoxypteroyl)-N.delta.- hemiphthaloyl-L-ornithine NSC633713