| abstract |
This invention relates to novel compositions and uses of carboxylic acid or isostere of a heterocyclic ring compound having two or more heteroatoms within the heterocyclic ring and wherein the heterocyclic ring has at least one substituent attached thereto, the substituent selected from the group consisting of a diketo, a sulfonamide, a urea, a carbamate, and substituted derivatives thereof for treating a vision disorder or improving vision or treating memory impairment or enhancing memory performance in an animal. |