trihydroxybenzophenone synthase activity
Catalysis of the reaction: benzoyl-CoA + 3 malonyl-CoA + 3 H+ = 2,4,6-trihydroxybenzophenone + 4 coenzyme A + 3 carbon dioxide.
GO:0016747
acyltransferase activity, transferring groups other than amino-acyl groups
is_a