tert-butyl 2-amino-2-oxoacetate

2-(环丙基氨基)乙醇

[(2,2-二甲氧基-乙基氨基草酰基)-氨基]-乙酸乙酯

环戊基(氧代)乙酸乙酯

5,7-dihydroxy-4-oxochromene-2-carboxylic acid