sodium p-hydroxy-phenylglyoxylate, sodium 2-(4-hydroxyphenyl)-2-oxoacetate, p-hydroxybenzoylformic acid sodium salt, sodium(4-hydroxyphenyl)(oxo)acetate, sodium 4-hydroxyphenylglyoxylate, sodium p-hydroxybenzoyl formate, 4-hydroxybenzoylformic acid,sodium salt