(1RS)-6-Benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylic acid; Ketorolac 6-Benzoyl Isomer; rac Ketorolac 6-Benzoyl Isomer; Ketorolac 6-benzoyl analog; 6-Benzoyl-2,3-dihydro-1H-pyrrolizine-1-carboxylic Acid