(2Z,6Z)-farnesyl diphosphate = alpha-humulene + diphosphate
(2z,6z)-farnesyl diphosphate = alpha-humulene + diphosphate
(2Z,6Z)-farnesyl diphosphate = alpha-humulene + diphosphate
(2z,6z)-farnesyl diphosphate = alpha-humulene + diphosphate