Patent ID: 8076491

Claim:
A compound of the formula: or a salt or N-oxide thereof, wherein Ar 6 and Ar 7 are the same or different, independently one from the other, and each is an optionally substituted five-membered heteroaryl group; Alk is an alkyl group; R 58 is H, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, acyl, substituted acyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl, or substituted heteroarylalkyl; R 59 and R 60 are the same or different independently one from the other, H, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, substituted arylalkyl, acyl, substituted acyl, heteroalkyl, substituted heteroalkyl, heteroaryl, substituted heteroaryl, heteroarylalkyl or substituted heteroarylalkyl, with the proviso that when one of R 59 or R 60 is H, then the other of R 59 or R 60 is not H; or R 59 and R 60 , together with the atom to which they are attached form a cycloalkyl, a substituted cycloalkyl, a cycloheteroalkyl or substituted cycloheteroalkyl ring; or R 58 and R 60 , together with the atoms to which they are attached, form a five- or six-membered cycloheteroalkyl or substituted cycloheteroalkyl ring.