2-(1,3-dioxolan-2-yl)-2-methyloct-7-en-4-one

tert-butyl 3-oxohept-6-enoate

1-tert-butyl-4-prop-2-enyltetrazol-5-one

1-tert-butyl-5-prop-2-enoxytetrazole

1-methyl-5-prop-2-enylsulfanyltetrazole