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