22351-56-0
2-乙基-1-茚酮
→
~43%
77202-48-3
3-ethyl-3,4-dihydrochromen-2-one
77202-46-1
ethyl 3-ethyl-2-oxochromane-3-carboxylate
66898-39-3
3-ethylchromen-2-one