2-ethoxy-6-methyl-4-phenyl-3,4-dihydro-2H-pyran

methyl 4-ethoxy-2-oxobut-3-enoate

2-乙氧基苯并二氢吡喃

2-(1-but-3-en-2-yl-4,4-dimethylcyclopent-2-en-1-yl)acetaldehyde

methyl 2-acetylbenzoate