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(+) => d-maltoheptaono-1,5-lactone + h2o