3-甲基-2-环己烯-1-酮

2,2-difluoro-6-methyl-7-oxabicyclo[4.1.0]heptane

2-(hydroxymethyl)-2-methylcyclopentan-1-one

4-(6-methyl-7-oxabicyclo[4.1.0]hept-2-en-2-yl)morpholine

3-methyl-2-phenylcyclohex-2-en-1-one