、
4-(pyridin-2-ylamino)-butyric acid 、
甘胺酸甲酯 、 Hobt tbtu 、 以0.364 g of [4-(pyridin-2-ylamino)butyrylamino]acetic acid [obtained from peptide coupling of 4-(pyridin-2-ylamino)butyric acid with glycine methyl ester in the presence of HOBT/TBTU and subsequent hydrolysis of the methyl ester, in each case under standard conditions]的产率得到[4-(pyridin-2-ylamino)butyrylamino]acetic acid