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

(S)-2-{4-[(2,4-Diamino-pteridin-6-ylmethyl)-methyl-amino]-benzoylamino}-4-propylcarbamoyl-butyric acid

(S)-4-{4-[(2,4-Diamino-pteridin-6-ylmethyl)-methyl-amino]-benzoylamino}-4-isopropylcarbamoyl-butyric acid

(S)-2-(4-Methylamino-benzoylamino)-4-propylcarbamoyl-butyric acid tert-butyl ester

(S)-4-tert-Butylcarbamoyl-4-(4-methylamino-benzoylamino)-butyric acid tert-butyl ester