(11Z)-eicosenoyl-CoA + malonyl-CoA + H(+) <=> 3-oxo-(13Z)-docosenoyl-CoA + CO2 + CoA
(11z)-eicosenoyl-coa + malonyl-coa + h(+) <=> 3-oxo-(13z)-docosenoyl-coa + co2 + coa
(11Z)-eicosenoyl-CoA + malonyl-CoA + H(+) <=> 3-oxo-(13Z)-docosenoyl-CoA + CO2 + CoA
(11z)-eicosenoyl-coa + malonyl-coa + h(+) <=> 3-oxo-(13z)-docosenoyl-coa + co2 + coa