label: (17Z,20Z,23Z,26Z)-dotriacontatetraenoyl-CoA + malonyl-CoA + H(+) => 3-oxo-(19Z,22Z,25Z,28Z)-tetratriacontatetraenoyl-CoA + CO2 + CoA
label_lc: (17z,20z,23z,26z)-dotriacontatetraenoyl-coa + malonyl-coa + h(+) => 3-oxo-(19z,22z,25z,28z)-tetratriacontatetraenoyl-coa + co2 + coa