D-maltotetraono-1,5-lactone + H2O <=> D-maltotetraonate + H(+)
d-maltotetraono-1,5-lactone + h2o <=> d-maltotetraonate + h(+)
D-maltotetraono-1,5-lactone + H2O <=> D-maltotetraonate + H(+)
d-maltotetraono-1,5-lactone + h2o <=> d-maltotetraonate + h(+)