(9Z)-octadecenoyl-CoA + malonyl-CoA + H(+) => 3-oxo-(11Z)-eicosenoyl-CoA + CO2 + CoA
(9z)-octadecenoyl-coa + malonyl-coa + h(+) => 3-oxo-(11z)-eicosenoyl-coa + co2 + coa
(9Z)-octadecenoyl-CoA + malonyl-CoA + H(+) => 3-oxo-(11Z)-eicosenoyl-CoA + CO2 + CoA
(9z)-octadecenoyl-coa + malonyl-coa + h(+) => 3-oxo-(11z)-eicosenoyl-coa + co2 + coa