label: 3-carboxy-2-hydroxy-7-methyl-6-oxo-(2Z,4Z)-octadienoate + H(+) = 2-hydroxy-7-methyl-6-oxo-(2E,4E)-octadienoate + CO2
label_lc: 3-carboxy-2-hydroxy-7-methyl-6-oxo-(2z,4z)-octadienoate + h(+) = 2-hydroxy-7-methyl-6-oxo-(2e,4e)-octadienoate + co2