2,3,6,8,9-pentahydroxy-1-oxo-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracene-2-carboxylate + H(+) => 2,3,6,8,9-pentahydroxy-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracen-1-one + CO2
2,3,6,8,9-pentahydroxy-1-oxo-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracene-2-carboxylate + h(+) => 2,3,6,8,9-pentahydroxy-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracen-1-one + co2
2,3,6,8,9-pentahydroxy-1-oxo-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracene-2-carboxylate + H(+) => 2,3,6,8,9-pentahydroxy-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracen-1-one + CO2
2,3,6,8,9-pentahydroxy-1-oxo-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracene-2-carboxylate + h(+) => 2,3,6,8,9-pentahydroxy-3-(2-oxopropyl)-1,2,3,4-tetrahydroanthracen-1-one + co2