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

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

1-but-3-enyl-4-tert-butyltetrazol-5-one

5-but-3-enoxy-1-tert-butyltetrazole

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