(3R,6S,1'S)-3,6-dimethyl-4-N-(1'-phenethyl)-1,4-morpholin-2,5-dione

DL-α-alanyl-DL-norvaline

α-amino-α-methylmalonic acid

D-丙氨酸甲酯盐酸盐

L-丙氨酸叔丁酯