2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate <=> 2,6-dioxo-6-phenylhexa-3-enoate
2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate <=> 2,6-dioxo-6-phenylhexa-3-enoate
2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate <=> 2,6-dioxo-6-phenylhexa-3-enoate
2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate <=> 2,6-dioxo-6-phenylhexa-3-enoate