Patent ID: 8283345

Claim:
A compound of formula (I): wherein: W and X are each independently selected from hydrogen, CH 2 OH, CH 2 OQ and CH 2 SQ; Y and Z are each independently selected from hydrogen, halogen, CH 2 OH, CH 2 OQ, CH 2 SQ, SQ, OQ and Q; Q is an alkyl, aralkyl or aryl group each of which may be optionally substituted with one or more substituents selected from hydroxy, halogen, methoxy, amino, or carboxy; R 1 is a radical of the formula (II) A is selected from CH and CR 2 , where R 2 is selected from halogen, alkyl, aralkyl, aryl, OH, NH 2 , NHR 3 , NR 3 R 4 and SR 5 , where R 3 , R 4 and R 5 are each alkyl, aralkyl or aryl groups optionally substituted with hydroxy or halogen, and where R 2 is optionally substituted with hydroxy or halogen when R 2 is alkyl, aralkyl or aryl; B is selected from hydroxy, NH 2 , NHR 6 , SH, hydrogen and halogen, where R 6 is an alkyl, aralkyl or aryl group optionally substituted with hydroxy or halogen; D is selected from hydroxy, NH 2 , NHR 7 , hydrogen, halogen and SCH 3 , where R 7 is an alkyl, aralkyl or aryl group optionally substituted with hydroxy or halogen; E is N; G is a C 1-4 saturated or unsaturated alkyl group optionally substituted with hydroxy or halogen; or a tautomer thereof, or a pharmaceutically acceptable salt thereof, or an ester thereof.