label: (2E,4Z,7Z,10Z,13Z,16Z,19Z)-docosaheptaenoyl-CoA + NADPH + H(+) => (3E,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl-CoA + NADP(+)
label_lc: (2e,4z,7z,10z,13z,16z,19z)-docosaheptaenoyl-coa + nadph + h(+) => (3e,7z,10z,13z,16z,19z)-docosahexaenoyl-coa + nadp(+)