methyl 4-oxohexanoate

2-ethyl-5-[(5-ethylfuran-2-yl)-(2-nitrophenyl)methyl]furan

5-ethyl-2,5-dimethoxy-2H-furan

5-ethyl-5-methoxyfuran-2-one

2-甲基-6-乙基-3-羟基吡啶