In enzymology, a benzophenone synthase () is an enzyme that catalyzes the chemical reaction 3 malonyl-CoA + 3-hydroxybenzoyl-CoA 4 CoA + 2,3',4,6-tetrahydroxybenzophenone + 3 CO2 Thus, the two substrates of this enzyme are malonyl-CoA and 3-hydroxybenzoyl-CoA, whereas its 3 products are CoA, 2,3',4,6-tetrahydroxybenzophenone, and CO2. This enzyme belongs to the family of transferases, specifically those acyltransferases transferring groups other than aminoacyl groups. The systematic name of this enzyme class is malonyl-CoA:3-hydroxybenzoyl-CoA malonyltransferase. References EC 2.3.1 Enzymes of unknown structure