(2S)-2-(4-(1-(2,4-diaminopteridin-6-yl)pent-4-yn-2-yl)benzamido)pentanedioic acid-D5; N-[4-[1-[(2,4-Diamino-6-pteridinyl)methyl]-3-butyn-1-yl]benzoyl]-L-glutamic Acid-d5; N-[4-[1-[(2,4-Diamino-6-pteridinyl)methyl]-3-butynyl]benzoyl]-L-glutamic Acid-d5; 10-Propargyl-10-deazaaminopterin-d5; Folotyn-d5; PDX
