(2Z,6Z)-farnesyl diphosphate => germacrene A + diphosphate
(2z,6z)-farnesyl diphosphate => germacrene a + diphosphate
(2Z,6Z)-farnesyl diphosphate => germacrene A + diphosphate
(2z,6z)-farnesyl diphosphate => germacrene a + diphosphate