pyrrolopyridinyl furopyridinyl such as furo 2 3 c pyridinyl furo 3 2 b pyridinyl or furo 2 3 b pyridinyl imidazopyridinyl such as imidazo 4 5 b pyridinyl or imidazo 4 5 c pyridinyl naphthyridinyl phthalazinyl purinyl pyridopyridyl quinazolinyl thienofuryl thienopyridyl thienothienyl and furyl the heteroaryl group may be substituted by independent replacement of 1 to 5 of the hydrogen atoms thereon with halogen oh cn mercapto nitro amino c 1 c 8 alkyl c 1 c 8 alkoxyl c 1 c 8 alkylthio c 1 c 8 alkyl amino di c 1 c 8 alkyl amino mono di tri and per halo alkyl formyl carboxy alkoxycarbonyl c 1 c 8 alkyl co u2014 o u2014 c 1 c 8 alkyl co u2014 nh u2014 or carboxamide heteroaryl may be substituted with a mono oxo to give for example a 4 oxo 1h quinoline the terms u201c heterocycle u201d u201c heterocyclic u201d and u201c heterocyclo u201d refer to an optionally substituted fully or partially saturated cyclic group which is for example a 4 to 7 membered monocyclic 7 to 11 membered bicyclic or 10 to 15 membered tricyclic ring system which has at least one heteroatom in at least one carbon atom containing ring each ring of the heterocyclic group containing a heteroatom may have 1 2 or 3 heteroatoms selected from nitrogen atoms oxygen atoms and sulfur atoms where the nitrogen and sulfur heteroatoms may also optionally be oxidized the nitrogen atoms may optionally be quaternized the heterocyclic group may be attached at any heteroatom or carbon atom exemplary monocyclic heterocyclic groups include.