| 摘要 |
<p>The present invention provides a compound of formula (I) wherein: R1 is 1-hydroxyethyl, 1-fluoroethyl or hydroxymethyl; R2 is hydrogen or C¿1-4?alkyl; R?3 and R4¿ are ortho with respect to one another wherein R?3 and R4¿ are independently hydroxy or in vivo hydrolysable esters thereof; the benzene ring being optionally further substituted; or a pharmaceutically acceptable salt or in vivo hydrolysable ester thereof.</p> |
