香芹酚

4,4,7-trimethylbicyclo[5.1.0]oct-2-en-6-one

2,2-二甲基丁二酸

2,6,6,7-tetramethylcyclohepta-2,4-dien-1-one

4,4,7-trimethyl-8-oxabicyclo[5.1.0]oct-2-en-6-one