4-coumaroyl-CoA + malonyl-CoA + H(+) => (4-coumaroyl)acetyl-CoA + CO2 + CoA
4-coumaroyl-coa + malonyl-coa + h(+) => (4-coumaroyl)acetyl-coa + co2 + coa
4-coumaroyl-CoA + malonyl-CoA + H(+) => (4-coumaroyl)acetyl-CoA + CO2 + CoA
4-coumaroyl-coa + malonyl-coa + h(+) => (4-coumaroyl)acetyl-coa + co2 + coa