(1E,3E)-4-Hydroxybuta-1,3-diene-1,2,4-tricarboxylate; 2-Hydroxy-4-carboxyhexa-2,4-dienedioate; 4-Carboxy-2-hydroxy-cis,cis-muconate; 4-Carboxy-2-hydroxyhexa-2,4-cis,cis-dienedioate; (1E,3E)-4-Hydroxybuta-1,3-diene-1,2,4-tricarboxylic acid

gallate:oxygen 4,5-oxidoreductase (decyclizing); Gallate + Oxygen <=> (1E,3E)-4-Hydroxybuta-1,3-diene-1,2,4-tricarboxylate

4-Carboxy-4-hydroxy-2-oxoadipate <=> (1E,3E)-4-Hydroxybuta-1,3-diene-1,2,4-tricarboxylate + H2O

4-carboxy-2-hydroxy-cis,cis-muconate-6-semialdehyde:NADP+ 6-oxidoreductase; 4-Carboxy-2-hydroxymuconate semialdehyde + NADP+ + H2O <=> (1E,3E)-4-Hydroxybuta-1,3-diene-1,2,4-tricarboxylate + NADPH + H+

4-carboxy-2-oxo-3-hexenedioate delta2,delta4-2-oxo,delta3-isomerase; 4-Carboxy-2-oxo-3-hexenedioate <=> (1E,3E)-4-Hydroxybuta-1,3-diene-1,2,4-tricarboxylate

4-oxalomesaconate keto---enol-isomerase; (1E)-4-Oxobut-1-ene-1,2,4-tricarboxylate <=> (1E,3E)-4-Hydroxybuta-1,3-diene-1,2,4-tricarboxylate