4-(4'-oxo-2',6',6'-trimethyl-2'-cyclohexen-1'-yl)-3-buten-2-one

4',4',7'-trimethyl-1',2',3',4'-tetrahydro-spiro[1,3-dioxolan-2,2'naphthalin]

7,9,9-trimethyl-1,4-dioxaspiro[4.5]dec-6-en-8-one

α-紫罗兰酮

4,12,12-trimethyl-1,7,10-trioxadispiro[2.2.4.2]dodec-4-en