1-(3,4-dihydro-2H-pyran-6-yl)-3-methylbut-2-en-1-one

2-(3-methylbut-2-enyl)cyclohexan-1-one

5,5-diethoxy-3-methylpent-2-enal

tert-butyl N,N-dimethylcarbamate

Dimethyl-carbamic acid (Z)-3-methyl-buta-1,3-dienyl ester