(S)-3,4,4-trimethyl-2-oxotetrahydrofuran-3-yl (S)-2-(1,3-dioxoisoindolin-2-yl)propanoate

3-酞酰亚胺基丙酸甲酯

DL-丙氨酰-DL-丝氨酸

N-benzyloxycarbonyl-L-phenylalanyl-L-alanine

(S)-2-(3,5-dinitro-4-oxopyridin-1(4H)-yl)propanoic acid