Α-L-谷氨酰-L-谷氨酸

H-ARG-VAL-OH

(S)-2-羟基-3-甲基丁酸甲酯

methyl 2-[[(2S)-3-methyl-2-(phenylmethoxycarbonylamino)butanoyl]amino]acetate

甲基N-[(苄氧基)羰基]-L-缬氨酸酯