cyanidin 3-O-[2''-O-(xylosyl)-6''-O-(p-coumaroyl) glucoside] 5-O-glucoside malonyltransferase activity
Catalysis of the reaction: anthocyanin A3 + malonyl-CoA = anthocyanin A5 + CoA.
GO:0016747
acyltransferase activity, transferring groups other than amino-acyl groups
is_a