Patent ID: 8101647

Claim:
A compound of formula (I): wherein: n is 0, 1, 2, 3 or 4; R 1 is selected from the group consisting of hydrogen, —R 5 —C(═NOR 6 )N(R 7 )R 8 , diphenylmethyl, aralkyl (optionally substituted with a substituent selected from the group consisting of —N(R 7 )R 8 , —C(═NOR 6 )N(R 7 )R 8 , —O—R 5 —OR 7 , —O—R 5 —C(O)OR 7 , —O—R 5 —C(O)N(R 7 )R 8 , —O—R 5 —N(R 7 )R 8 and —S(O)R 7 ) and heterocyclylalkyl (optionally substituted with —C(O)R 7 ); R 2 is hydrogen; R 3 is selected from the group consisting of —O—R 5 —N(R 7 )R 8 , —O—R 5 —N(R 7 )C(O)OR 8 , —O—R 5 —C(O)OR 7 , —O—Si(R 7 ) 3 and —N[S(O) 2 R 7 ] 2 ; or R 2 and R 3 , together with the carbons to which they are attached, form a fused O-heterocyclyl ring optionally substituted by —NOR 7 ; R 4 is selected from the group consisting of alkyl, halo, haloalkyl, optionally substituted aryl and optionally substituted aralkyl; each R 5 is independently selected from the group consisting of an optionally substituted straight or branched alkylene chain, an optionally substituted straight or branched alkenylene chain and an optionally substituted straight or branched alkynylene chain; R 6 is selected from the group consisting of hydrogen and —C(O)R 7 ; and each R 7 and R 8 is independently selected from the group consisting of hydrogen, alkyl, haloalkyl, optionally substituted aryl, optionally substituted aralkyl, optionally substituted cycloalkyl, optionally substituted cycloalkylalkyl, and optionally substituted heterocyclyl; as a stereoisomer, enantiomer or tautomer thereof or mixtures thereof; or a pharmaceutically acceptable salt thereof.