preferred_name: catechol + O2 <=> (2Z,4E)-2-hydroxy-6-oxohexa-2,4-dienoate + H(+)
preferred_name_lc: catechol + o2 <=> (2z,4e)-2-hydroxy-6-oxohexa-2,4-dienoate + h(+)
label: catechol + O2 <=> (2Z,4E)-2-hydroxy-6-oxohexa-2,4-dienoate + H(+)
label_lc: catechol + o2 <=> (2z,4e)-2-hydroxy-6-oxohexa-2,4-dienoate + h(+)