2-羟基-4-氨基丁酸

aspartic acid anion II

L-β-alanine (6-methoxy-2-oxo-2H-benzo[h]benzopyran-4-yl)methyl ester hydrobromide

N-[(6-methoxy-2-oxo-2H-benzo[h]benzopyran-4-yl)methyloxycarbonyl]-L-β-alanine

2,4-二氨基丁酸