Patent ID: 7951939

Claim:
A compound of Formula II: wherein: R a and R b are each independently loweralkyl; R 1 is H, alkyl or aryl; R 2 , R 3 , R 4 , and R 5 are each independently selected from the group consisting of H, halo, loweralkoxy, and loweralkylthio; and A is selected from the group consisting of H, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkylalkyl, cycloalkylalkenyl, cycloalkylalkynyl, aryl, arylalkyl, arylalkenyl, arylalkynyl, alkoxy, halo, mercapto, azido, cyano, hydroxyl, nitro, acyl, alkoxy, alkylthio, amino, alkylamino, arylalkylamino, disubstituted amino, acylamino, acyloxy, amide, sulfonamide, urea, alkoxylacylamino, aminoacyloxy, hydrophilic groups, surface attachment groups, cross-coupling groups and bioconjugatable groups.