3-Deazamethotrexate 34561-27-8 BRN 0871116 L-Glutamic acid, N-(4-(((6,8-diaminopyrido(2,3-b)pyrazin-2-yl)methyl)methylamino)benzoyl)- N-(p-(((6,8-Diaminopyrido(2,3-b)pyrazin-2-yl)methyl)methylamino)benzoyl)glutamic acid SRI 4782