D-galactaro-1,4-lactone <=> 5-dehydro-4-deoxy-D-glucarate + H(+)
d-galactaro-1,4-lactone <=> 5-dehydro-4-deoxy-d-glucarate + h(+)
D-galactaro-1,4-lactone <=> 5-dehydro-4-deoxy-D-glucarate + H(+)
d-galactaro-1,4-lactone <=> 5-dehydro-4-deoxy-d-glucarate + h(+)