摘要 |
Compounds useful for the treatment of pain in accord with the following structural diagram, wherein R<SUP>1</SUP>, R<SUP>2</SUP>, R<SUP>3</SUP>, R<SUP>4 </SUP>and R<SUP>5 </SUP>are any of a number of groups as defined in the specification, A and D are as defined in the specification, and pharmaceutical compositions and methods of treatment utilising such compounds. |