Patent ID: 8846723

Claim:
An ester of O-substituted hydroxy carboxylic acids having Formula 1: wherein R is retinyl; R 1 is selected from the group consisting of branched- and straight-chain, saturated C 1 -C 6 alkyl; branched- and straight-chain, unsaturated and polyunsaturated C 2 -C 22 alkyl; C 3 -C 8 cycloalkyl; C 6 -C 20 carbocyclic aryl; and C 4 -C 20 heterocyclic group; the heterocyclic group comprises sulfur, nitrogen, or oxygen; the heterocyclic group excludes ascorbic acid; and n is 1-6, with the proviso that when R 1 is a substituted, straight-chain, saturated C 1 -C 6 alkyl, the substituent is selected from the group consisting of C 1 -C 6 -alkoxy, carboxyl, amino, C 1 -C 15 aminocarbonyl, C 1 -C 15 amido, cyano, C 2 -C 6 -alkoxycarbonyl, C 2 -C 6 -alkanoyloxy, hydroxy, aryl, heteroaryl, thiol, thioether, C 2 -C 10 dialkylamino, C 3 -C 15 trialkylammonium and halogen.