label: 3 isopentenyl diphosphate + (2E,6E,10E)-geranylgeranyl diphosphate = all-trans-heptaprenyl diphosphate + 3 diphosphate
label_lc: 3 isopentenyl diphosphate + (2e,6e,10e)-geranylgeranyl diphosphate = all-trans-heptaprenyl diphosphate + 3 diphosphate