(2Z,4E)-2-hydroxy-5-methyl-6-oxohexa-2,4-dienoic acid
(2z,4e)-2-hydroxy-5-methyl-6-oxohexa-2,4-dienoic acid
A muconic semialdehyde that is 6-oxohexa-2,4-dienoic acid which is substituted by a hydroxy group at position 2 and a methyl group at position 5 (the 2<i>Z</i>,4<i>E</i> isomer).