27415-09-4 4-(2'-Carboxyphenyl)-4-oxobutyrate 4-(2'-Carboxyphenyl)-4-oxobutyric acid 4-(2-Carboxyphenyl)-4-oxobutanoic acid Benzenebutanoic acid, 2-carboxy-gamma-oxo- Benzoic acid, o-(3-carboxypropionyl)- o-Succinylbenzoic acid