2-oxo-benzooxazole-3-carboxylic acid phenyl ester
2-oxo-benzooxazole-3-carboxylic acid o-tolyl ester
2-oxo-benzooxazole-3-carboxylic acid m-tolyl ester
2-oxo-benzooxazole-3-carboxylic acid 2-chloro-phenyl ester
2-oxo-benzooxazole-3-carboxylic acid ethyl ester