4-hydroxycoumarin + CO2 + 2 CoA => 2-hydroxybenzoyl-CoA + malonyl-CoA
4-hydroxycoumarin + co2 + 2 coa => 2-hydroxybenzoyl-coa + malonyl-coa
4-hydroxycoumarin + CO2 + 2 CoA => 2-hydroxybenzoyl-CoA + malonyl-CoA
4-hydroxycoumarin + co2 + 2 coa => 2-hydroxybenzoyl-coa + malonyl-coa