(2E,6E)-farnesyl diphosphate = germacrene A + diphosphate
(2e,6e)-farnesyl diphosphate = germacrene a + diphosphate
(2E,6E)-farnesyl diphosphate = germacrene A + diphosphate
(2e,6e)-farnesyl diphosphate = germacrene a + diphosphate