(2E)-geranyl diphosphate <=> beta-phellandrene + diphosphate
(2e)-geranyl diphosphate <=> beta-phellandrene + diphosphate
(2E)-geranyl diphosphate <=> beta-phellandrene + diphosphate
(2e)-geranyl diphosphate <=> beta-phellandrene + diphosphate