Patent ID: 7902202

Claim:
A compound of the formula: or a pharmaceutically acceptable salt, a stereoisomeric, or tautomeric form thereof, wherein: R y is alkyl, alkenyl, alkynyl, aryl, arylalkyl, cycloalkyl, cycloalkenyl, amino, heterocyclyl or heteroaryl; R a and R b are selected as follows: i) R a and R b are each independently hydrogen, alkyl, carboxyalkyl, hydroxyalkyl, hydroxyarylalkyl, acyloxyalkyl, aminocarbonylalkyl, alkoxycarbonylalkyl, aryl, arylalkyl, cycloalkyl, heteroaryl or heterocyclyl; or ii) R a and R b together with the nitrogen atom on which they are substituted form a 3-7 membered heterocyclic or heteroaryl ring; A is H, alkyl, alkenyl, alkynyl, azido, carboxylic acid, CO 2 -alkyl, cyano, or carboxamide; and R L is independently H, carbamyl, alkyl; acyl; CO-alkyl, CO-aryl, CO-alkoxyalkyl, CO-aryloxyalkyl, CO-substituted aryl, alkylsulfonyl, arylsulfonyl, arylalkylsulfonyl, a lipid, an amino acid or a carbohydrate.