Sesquiterpene cyclase catalyzing the production of 8-epi-cedrol. Able to convert geranyl diphosphate to monoterpens. Can use farnesyl diphosphate or geranyl diphosphate as substrates, but not geranylgeranyl diphosphate. Probably not involved in artemisinin biosynthesis. (2E,6E)-farnesyl diphosphate + H2O = diphosphate + epi-cedrol Binds 3 Mg(2+) or Mn(2+) ions per subunit. Inhibited by high concentration of manganese. Optimum pH is 8.5-9.0. Secondary metabolite biosynthesis; terpenoid biosynthesis. Constitutively expressed in leaves and flowers. The Asp-Asp-Xaa-Xaa-Asp/Glu (DDXXD/E) motif is important for the catalytic activity, presumably through binding to Mg(2+). Belongs to the terpene synthase family.