label: 3-hydroxy-2-methylpyridine-5-carboxylate + CO2 => 5-hydroxy-6-methylpyridine-3,4-dicarboxylate + H(+)
label_lc: 3-hydroxy-2-methylpyridine-5-carboxylate + co2 => 5-hydroxy-6-methylpyridine-3,4-dicarboxylate + h(+)