Component of the volatile terpenes biosynthesis pathways (PubMed:30187155). Dihydroxylated sesquiterpenoid synthase that generates dually hydroxylated products directly from (E,E)-farnesyl diphosphate, primarily eudesmane-2,11-diol, along with two closely related structural isomers (PubMed:29570233). (2E,6E)-farnesyl diphosphate + 2 H2O = 7-epi-ent-eudesmane-5,11-diol + diphosphate Binds 3 Mg(2+) or Mn(2+) ions per subunit. Secondary metabolite biosynthesis; terpenoid biosynthesis. Monomer. Specifically expressed in roots. Induced by fungal pathogen infection (e.g. F.verticillioide). 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.