The molecule is the conjugate base of 2-hydroxypenta-2,4-dienoic acid. It derives from a penta-2,4-dienoate. It is a conjugate base of a 2-hydroxypenta-2,4-dienoic acid. It is a tautomer of a 2-oxopent-4-enoate.
(2Z)-1-hydroxy-1-oxopenta-2,4-dien-2-olate