ethyl 3-(2-amino-acetylamino)-3-pyridin-3-yl-propionate hydrochloride 、
2-(imidazolidin-2-ylideneamino)-thiazole-4-carboxylic acid 生成 ethyl rac-3-(2-{[2-(imidazolidin-2-ylideneamino)-thiazole-4-carbonyl]-amino}-acetyl-amino)-3-pyridin-3-yl-propionate