Patent ID: 7659244

Claim:
A compound of the formula wherein, R is NH-(A) n -CH 2 OH; or wherein R as defined above comprises an amino acid; an amino alcohol or a peptide; A is D or L amino acid and n=1-10, R 1 and R 2 are each independently, hydrogen, alkyl of 1-6 carbons atoms, hydroxyalkyl of 1-6 carbon atoms, or CO 2 R 8 , R 3 is Ar, wherein Ar is aromatic or heteroaromatic; R 4 , R 5 and R 6 are each independently alkyl of 1-6 carbon atoms or hydroxyalkyl of 1-6 carbon atoms; R 7 is alkyl of 1-10 carbon atoms; R 8 is alkyl of 1-6 carbon atoms; and R 9 is cycloalkoxyalkyl of 4-10 carbon atoms; wherein R and said compound of formula I are linked through a carbamate ester linkage.