label: 3-oxo-(6Z,9Z,12Z,15Z,18Z,21Z)-tetracosahexaenoyl-CoA + CO2 + CoA => (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl-CoA + malonyl-CoA + H(+)
label_lc: 3-oxo-(6z,9z,12z,15z,18z,21z)-tetracosahexaenoyl-coa + co2 + coa => (4z,7z,10z,13z,16z,19z)-docosahexaenoyl-coa + malonyl-coa + h(+)