Patent ID: 7060834

Claim:
A compound in accord with structural diagram I; wherein: R 1 at each occurrence is independently selected from (C 1 –C 8 )alkyl, (C 2 –C 8 )alkenyl, (R 2 ) b phenyl, (R 2 ) b heteroaryl or (R 2 ) b bicyclic heteroaryl; b at each occurrence is an independently integer selected from 0, 1, 2 and 3; R 2 at each occurrence is independently selected from halogen, (C 1 –C 6 )alkyl, heterocyclyl, OH, (C 1 –C 6 )alkoxy or NR 3 2 ; A is selected from —CH 2 — or a single bond, wherein if A is a single bond, then (R 1 ) b is R 1 ; R 4 is selected from (C 1 –C 6 )alkyl or (C 1 –C 4 )alkoxy(C 1 –C 4 )alkyl; R 3 and R 5 at each occurrence are independently selected from H or (C 1 –C 4 )alkyl; R 6 is selected from H, halogen, (C 1 –C 3 )alkyl, (C 1 –C 3 )perfluoroalkyl, (C 1 –C 3 )alkoxy, hydroxy, NH 2 or NHR 2 ; R 7 is selected from H, halogen, (C 1 –C 6 )alkyl, (C 1 –C 4 )perfluoroalkyl, (C 1 –C 6 )alkoxy, hydroxy, (C 1 –C 6 )alkanoyl, C(═O)NR 2 2 or —NR 2 2 ; and R 8 is H.