3-oxo-(21Z,24Z,27Z,30Z)-hexatriacontatetraenoyl-CoA + NADPH + H(+) <=> (3R)-hydroxy-(21Z,24Z,27Z,30Z)-hexatriacontatetraenoyl-CoA + NADP(+)
3-oxo-(21z,24z,27z,30z)-hexatriacontatetraenoyl-coa + nadph + h(+) <=> (3r)-hydroxy-(21z,24z,27z,30z)-hexatriacontatetraenoyl-coa + nadp(+)