spermidine + NAD(+) = dehydrospermidine + NADH + H(+)
spermidine + nad(+) = dehydrospermidine + nadh + h(+)
spermidine + NAD(+) = dehydrospermidine + NADH + H(+)
spermidine + nad(+) = dehydrospermidine + nadh + h(+)