The molecule is a 5-hydroxypenta-2,4-diene-1,2,5-tricarboxylic acid in which the double bond geometry is specified as (2E,4Z). It is a conjugate acid of a (2E,4Z)-5-hydroxypenta-2,4-diene-1,2,5-tricarboxylate(3-).
(2E,4Z)-5-hydroxypenta-2,4-diene-1,2,5-tricarboxylic acid