2-But-3-enyl-2-(2-methyl-[1,3]dioxolan-2-yl)-hex-5-enoic acid ethyl ester

2-But-3-enyl-2-(2-methyl-[1,3]dioxolan-2-yl)-hex-5-en-1-ol

2-but-3-enyl-4-hydroxy-3-methyl-cyclopent-2-enone

2-Methyl-hept-6-ene-1,2-diol

2-Vinyl-1-methylcyclobutan-1-ol