ubiquinol-8 + NAD(+) => ubiquinone-8 + NADH + H(+)
ubiquinol-8 + nad(+) => ubiquinone-8 + nadh + h(+)
ubiquinol-8 + NAD(+) => ubiquinone-8 + NADH + H(+)
ubiquinol-8 + nad(+) => ubiquinone-8 + nadh + h(+)