6-[(4-carboxyphenyl)carbamoyl]-7-oxabicyclo[2.2.1]heptane-5-carboxylic acid 6-[[(4-carboxyphenyl)amino]-oxomethyl]-7-oxabicyclo[2.2.1]heptane-5-carboxylic acid AR-013/42256315 3-[(4-carboxyanilino)carbonyl]-7-oxabicyclo[2.2.1]heptane-2-carboxylic acid MLS001179069 SMR000477884