1-tert-butyl-4-pent-4-enyltetrazol-5-one

1-tert-butyl-5-pent-4-enoxytetrazole

methyl 4-pent-4-enylnon-8-en-2-ynoate

8-methyl-2,5,6,7-tetrahydro-1H-indolizin-3-one

2-methylhept-6-enenitrile