Sesquithujene synthase (EC 4.2.3.102, TPS5-Del1) is an enzyme with systematic name (2E,6E)-farnesyl-diphosphate diphosphate-lyase (sesquithujene-forming).[1] This enzyme catalyses the following chemical reaction
The enzyme from Zea mays, variety Delprim, gives mainly sesquithujene.