| 摘要 |
<p>The present invention provides a compound of formula (I) <CHEM> or a salt, ester or amide thereof; wherein R<1> is -CH2-CH2-, CH2-O- or -O-CH2-; R<2> and R<3> are the same or different and are each hydrogen, C1-4 alkyl or taken together with the nitrogen comprise a nitrogen-containing heterocyclic ring having four to six ring members; R<1> is a single bond or a C1-7 bivalent aliphatic hydrocarbon group and may be joined to the aromatic ring system at the 2,3,8 or 9 positions; n is 0 to 3, processes for its preparation and intermediates therefor, pharmaceutical compositions containing it and its use in medicine.</p> |
