Patent ID: 7049343

Claim:
A compound of the structure: wherein r is an integer of one to three; s is an integer of one or two; t is an integer of one to four; R 6 and R 7 at each occurrence are each independently selected from the group consisting of: halogen, alkenyl, alkynyl, aliphatic acyl, —CF 3 , —NO 2 , —CN, —C(O)O—(C 1 –C 3 alkyl), —C(O)NH—(C 1 –C 3 alkyl), alkoxy, —C(O)N(C 1 –C 3 alkyl) 2 , aryl, aroyl, sulfonyl, —SO 2 —(C 1 –C 3 alkyl), —SO 3 —(C 1 –C 3 alkyl) and sulfonamido; and R 5 is selected from the group consisting of: hydrogen, amino, hydroxy, alkoxy, aliphatic acyl, —CN, carboxyl, carboxamide, alkoxycarbonyl, —C(O)NHOH, —C(O)NHNH 2 and carboxaldehyde; wherein R 5 , R 6 and R 7 are unsubstituted, or substituted with at least one electron donating or electron withdrawing group; or a pharmaceutically acceptable salt thereof.