2,4-Hexadienoic acid, 6-oxo-, (E,E)- 6-Oxo-2,4-hexadienoic acid (E,E)- 6-Oxo-trans,trans-2,4-hexadienoic acid 6-Oxohexa-2,4-dienoic acid 88973-46-0 CCRIS 7058