D-maltopentaonate + H(+) => D-maltopentaono-1,5-lactone + H2O
d-maltopentaonate + h(+) => d-maltopentaono-1,5-lactone + h2o
D-maltopentaonate + H(+) => D-maltopentaono-1,5-lactone + H2O
d-maltopentaonate + h(+) => d-maltopentaono-1,5-lactone + h2o