10-deazaaminopterin

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

N-[4-[2-(2,4-Diaminopteridine-6-yl)ethyl]benzoyl]-L-glutamic acid

(2S)-2-[4-[2-(2,4-Diamino-6-pteridinyl)ethyl]benzoylamino]glutaric acid