Patent ID: 8916723

Claim:
A compound of general formula I wherein R is selected from the group consisting of CO 2 Y, B(OY) 2 , CHO, CH(CO 2 Y) 2 , PO(OY) 2 and CONHZ, wherein Y is selected from the group consisting of hydrogen, alkyl, alkenyl, alkynyl, aryl, heteroaryl, substituted alkyl, substituted alkenyl, cycloalkyl, substituted heteroaryl and tetrazolyl and Z is selected from the group consisting of hydrogen, hydroxyl, alkyl, alkyl-sulfonyl, unsubstituted or substituted aryl sulfonyl, cyanoalkyl and COXM wherein X is S, SO or SO 2 and M is selected from the group consisting of hydrogen, alkyl, unsubstituted or substituted alkyl, unsubstituted or substituted aryl, and unsubstituted or substituted heteroaryl; R 1 is selected from the group consisting of hydrogen, alkyl, unsubstituted heteroaryl, substituted heteroaryl, substituted alkyl, and unsubstituted cycloalkyls or substituted cycloalkyls; R 2 is selected from the group consisting of hydrogen, alkyl, unsubstituted aryl, substituted aryl, unsubstituted heteroaryl, substituted heteroaryl, substituted alkyl, and unsubstituted cycloalkyls or substituted cycloalkyls; R 3 is selected from the group consisting of hydrogen, alkyl, alkoxy, and substituted or unsubstituted heteroaryl; and R 4 is selected from the group consisting of hydrogen, heteroalkyl, substituted or unsubstituted aryl, unsubstituted or substituted heteroaryl, alkoxy, substituted or unsubstituted aryl carbonyl and substituted keto compounds.