(2S)-2-[[(4S)-4-carboxy-4-[[(4S)-4-carboxy-4-[[(4S)-4-carboxy-4-[[4-[(2,4-diaminopteridin-6-yl)methyl-methylamino]benzoyl]amino]butanoyl]amino]butanoyl]amino]butanoyl]amino]pentanedioic acid

2-[[4-[(2,4-二氨基蝶啶-6-基)甲基-甲基氨基]苯甲酰基]氨基]-5-[(2-甲基丙烷-2-基)氧基]-5-氧代戊酸

4-[[2-(2,4-diaminopteridin-6-yl)acetyl]amino]benzoic acid

6-[(4-chloroanilino)methyl]pteridine-2,4-diamine

6-[(2-phenylethylamino)methyl]pteridine-2,4-diamine