133587-38-9 2,4-Hexadienoic acid, 2-hydroxy-6-(2-hydroxyphenyl)-6-oxo- 2-Hydroxy-6-(2-hydroxyphenyl)-6-oxo-2,4-hexadienoic acid 2-Hydroxy-6-oxo-6-(2-hydroxyphenyl)hexa-2,4-dienoate 2-Hydroxy-6-oxo-6-(2-hydroxyphenyl)hexa-2,4-dienoic acid Hohpda