摘要 |
Compounds of structure (I) …<CHEM>… in which Y is H, OH, halogen or C1-4 alkoxy; X is H, halogen, halo C1-4 alkyl, n is 1 to 5 and R is H or C1-4 alkyl and pharmaceutically acceptable salts or hydrates thereof, processes for their preparation, compositions containing them and their use in therapy. |