- 2-Hydroxymuconate semialdehyde
- 2-hydroxymuconate-semialdehyde hydrolase
- 2-hydroxymuconate tautomerase
- 2-Oxopent-4-enoic acid
- 2-hydroxy-4-carboxymuconate semialdehyde hemiacetal dehydrogenase
- 5-carboxymethyl-2-hydroxymuconate Delta-isomerase
- 2-Hydroxymuconate-6-semialdehyde dehydrogenase
- 5-carboxymethyl-2-hydroxymuconic-semialdehyde dehydrogenase
- Catechol 2,3-dioxygenase
- C6H6O4
