(2E,4E)-2-HYDROXY-6-OXO-6-PHENYLHEXA-2,4-DIENOIC ACID(2Z,4E)-2-HYDROXY-6-OXO-6-PHENYLHEXA-2,4-DIENOIC ACID2-hydroxy-6-oxo-6-phenyl-2,4-hexadienoic acidHDPA2,6-Dioxo-6-phenylhexa-3-enoate2-Hydroxy-6-oxo-6-phenylhexa-2,4-dienoate2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoic acidHOPDA