10-Ethyl-10-deazaaminopterine

N-[4-[1-[(2,4-Diaminopteridin-6-yl)methyl]propyl]benzoyl]-L-glutamic acid

N-(4-(1-((2,4-Diamino-6-pteridinyl)methyl)propyl)benzoyl)-L-glutamic acid

2-[[4-[1-(2,4-Diaminopteridin-6-yl)butan-2-yl]benzoyl]amino]pentanedioic acid