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Priority claimed from PCT/GB2004/004112external-prioritypatent/WO2005030761A1/en
Priority claimed from PCT/GB2004/004124external-prioritypatent/WO2005030732A1/en
Application filed by Astrazeneca AbfiledCriticalAstrazeneca Ab
Publication of TW200626577ApublicationCriticalpatent/TW200626577A/en
Compounds of Formulae I, or pharmaceutically acceptable salts thereof: wherein R1, R2, R3, R4 and G are as defined in the specification as well as salts and pharmaceutical compositions including the compounds are prepared. They are useful in therapy, in particular in the management of pain.