The molecule is a 2-hydroxypenta-2,4-dienoate in which the double bond between positions 2 and 3 has E- (cis-) geometry. It is a 2-hydroxypenta-2,4-dienoate and a 2-hydroxy fatty acid anion. It is a conjugate base of a cis-2-hydroxypenta-2,4-dienoic acid.
(2E)-1-hydroxy-1-oxopenta-2,4-dien-2-olate