[(2-甲氧基苯基)甲基]-丁二酸

5-bromo-4-oxopentanoic acid

ethyl 2-[7-(ethoxycarbonylamino)-4-methyl-2-oxochromen-3-yl]acetate

2-(3-溴丙基)-2-甲基-1,3-二氧戊环

3-(2-methyl-1,3-dioxolan-2-yl)propan-1-ol