3-dehydro-L-gulonate + NAD(+) = 2,3-dioxo-L-gulonate + NADH + H(+)
3-dehydro-l-gulonate + nad(+) = 2,3-dioxo-l-gulonate + nadh + h(+)
3-dehydro-L-gulonate + NAD(+) = 2,3-dioxo-L-gulonate + NADH + H(+)
3-dehydro-l-gulonate + nad(+) = 2,3-dioxo-l-gulonate + nadh + h(+)