7-chloro-4-hydroxychromen-2-one

ethyl 3-(5-chlorothiophen-2-yl)-3-oxopropanoate

ethyl 5,5-difluoro-2-oxocyclohexane-1-carboxylate

2-乙氧基戊烷

4-hydroxy-7-methoxy-3-phenoxychromen-2-one