label: 4 isopentenyl diphosphate + (2E,6E)-farnesyl diphosphate = all-trans-heptaprenyl diphosphate + 4 diphosphate
label_lc: 4 isopentenyl diphosphate + (2e,6e)-farnesyl diphosphate = all-trans-heptaprenyl diphosphate + 4 diphosphate