trans,trans-2,4-dihydroxy-5-methyl-6-oxo-2,4-hexadienoate
trans,trans-2,4-dihydroxy-5-methyl-6-oxo-2,4-hexadienoate
A hydroxy monocarboxylic acid anion that is the conjugate base of <i>trans</i>,<i>trans</i>-2,4-dihydroxy-5-methyl-6-oxo-2,4-hexadienoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3.