3,4,5-trihydroxybenzoate + O2 <=> (1E)-4-oxobut-1-ene-1,2,4-tricarboxylate + 2 H(+)
3,4,5-trihydroxybenzoate + o2 <=> (1e)-4-oxobut-1-ene-1,2,4-tricarboxylate + 2 h(+)
3,4,5-trihydroxybenzoate + O2 <=> (1E)-4-oxobut-1-ene-1,2,4-tricarboxylate + 2 H(+)
3,4,5-trihydroxybenzoate + o2 <=> (1e)-4-oxobut-1-ene-1,2,4-tricarboxylate + 2 h(+)