a cis-3-alkyl-4-alkyloxetan-2-one = a cis-alkene + CO2
a cis-3-alkyl-4-alkyloxetan-2-one = a cis-alkene + co2
"cis-3-alkyl-4-alkyloxetan-2-one decarboxylase"
"cis-3-alkyl-4-alkyloxetan-2-one decarboxylase"