氨气

2-Amino-4-[2-[2-(4-amino-4-carboxy-butyrylamino)-2-(carboxymethyl-carbamoyl)-ethyldisulfanyl]-1-(carboxymethyl-carbamoyl)-ethylcarbamoyl]-butyric acid

乙醇钠

3-氯丙酸乙酯

L-谷氨酰胺