(4-coumaroyl)acetyl-CoA + 4-coumaroyl-CoA + H2O => bisdemethoxycurcumin + CO2 + 2 CoA
(4-coumaroyl)acetyl-coa + 4-coumaroyl-coa + h2o => bisdemethoxycurcumin + co2 + 2 coa
(4-coumaroyl)acetyl-CoA + 4-coumaroyl-CoA + H2O => bisdemethoxycurcumin + CO2 + 2 CoA
(4-coumaroyl)acetyl-coa + 4-coumaroyl-coa + h2o => bisdemethoxycurcumin + co2 + 2 coa