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