has role 4-hydroxyphenylacetic acid acetate monocarboxylic acid anion 4-hydroxyphenylacetate 4-hydroxybenzeneacetate A monocarboxylic acid anion that is obtained by removal of a proton from the carboxylic acid group of 4-hydroxyphenylacetic acid. 4-hydroxyphenylacetate MetaCyc:4-HYDROXYPHENYLACETATE (p-hydroxyphenyl)acetate CHEBI:48999 2-(4-hydroxyphenyl)ethanoate (4-hydroxyphenyl)acetate plant metabolite fungal metabolite human metabolite