4-羟基丁酸甲酯

methyl 4-[2-(1H-indol-3-yl)ethylamino]-4-oxobutanoate

3-bromo-4-methoxy-4-oxobutanoate

2-bromo-4-methoxy-4-oxobutanoate

methyl 3-[(2-methylpropan-2-yl)oxycarbonylamino]propanoate