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