(R)-2-(carboxymethyl)-5-oxo-2,5-dihydro-2-furoate + H(+) => (4,5-dihydro-5-oxofuran-2-yl)-acetate + CO2
(r)-2-(carboxymethyl)-5-oxo-2,5-dihydro-2-furoate + h(+) => (4,5-dihydro-5-oxofuran-2-yl)-acetate + co2
(R)-2-(carboxymethyl)-5-oxo-2,5-dihydro-2-furoate + H(+) => (4,5-dihydro-5-oxofuran-2-yl)-acetate + CO2
(r)-2-(carboxymethyl)-5-oxo-2,5-dihydro-2-furoate + h(+) => (4,5-dihydro-5-oxofuran-2-yl)-acetate + co2