(+)-ñ-Barbatene synthase (EC 4.2.3.69, AtBS) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase ((+)-ñ-barbatene-forming). This enzyme catalyses the following chemical reaction
The recombinant enzyme from the plant Arabidopsis thaliana produces ñ-barbatene, thujopsene and ò-chamigrene.