摘要 |
<p>The present invention provides compounds of formula (I) wherein n, R<sup>1</sup>, R<sup>2</sup>, X<sup>1</sup>, X<sup>2</sup>, X<sup>3</sup>, X<sup>4,</sup> X<sup>5</sup>, R<sup>3a</sup>, R<sup>3b</sup>, R<sup>4</sup>, R<sup>5</sup> and R<sup>6</sup> are defined in the specification, a process for their preparation, pharmaceutical compositions containing them and their use in therapy.</p> |