5-Benzoylbenzoxazolone-2'-carboxylic acid

o-(2,3-Dihydro-2-oxobenzoxazol-5-ylcarbonyl)benzoic acid

2-[(2,3-Dihydro-2-oxobenzoxazol-5-yl)carbonyl]benzoic acid

2-[(2,3-dihydro-2-oxo-5-benzoxazol-yl)carbonyl]benzoic acid