4-乙氧基二苯并[b,d]呋喃

ethyl 3,4-dihydro-2H-pyran-6-carboxylate

1,2-diethoxyanthracene-9,10-dione

prop-2-enyl N-(1-ethoxyethyl)carbamate

3-溴-5-乙氧基苯甲酸