Patent ID: 7144880

Claim:
A composition comprising the following formula: wherein R1 is selected from the group consisting of H, alkyl, or substituted alkyl; wherein R2 is selected from the group consisting of hydrogen, a hydroxy, an alkoxy, a halo, an amino, an alkyl group having 1–8 carbons and 1–20 hydrogens, a substituted amino, an acetylamino, a hydroxyamino, an aliphatic group having 1–8 carbons and 1–20 hydrogens, a cycloaliphatic group consisting of <10 carbons, a substituted cycloaliphatic group, an aryl, a heterocyclic; wherein R3 is selected from the group consisting of H, alkyl, or substituted alkyl, and wherein at most one substituent is a hydroxyl subgroup; wherein R4 is selected from the group consisting of wherein n=0–5; and wherein R 1 , R 2 , R 3 , and R 4 include both R or S enantiomeric forms and racemic mixtures.