3,4-dihydro-3,4,5,6-tetramethyl-2-pyrone

3-甲基-3-戊烯-2-酮

2,3,4-trimethyl-5-oxohexanoic acid

5,5-dicarbethoxy-3,4-dimethyl-2-hexanone

4H-Pyran-4-one, 2,3,5,6-tetramethyl-