ò-Eudesmol synthase (EC 4.2.3.68) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase (ò-eudesmol-forming). This enzyme catalyses the following chemical reaction
The recombinant enzyme from ginger (Zingiber zerumbet) gives ò-eudesmol, 10-epi-ó-eudesmol, ñ-eudesmol and aristolene.