| 摘要 |
<p>A compound of formula (I) or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, wherein, Ro represents an aryl group optionally substituted with one, two or three substituents selected from the list consisting of: hydroxy, hydroxymethyl, nitro, amino, alkylamino, dialkylamino, alkylsulphonamido, arylsulphonamido, formamido, halogen, alkoxy and allyl; X represents O or S; R?1 and R1a¿ each independently represents hydrogen or an alkyl group; R2 represents OCH¿2?CO2H, or an ester or amide thereof, or R?2¿ represents a moiety of formula (b) wherein R4 represents hydrogen, alkyl, hydroxyalkyl, arylalkyl, aralkyloxyalkyl or cycloalkyl and R5 represents hydroxy, alkoxy, arylalkyloxy, hydroxyalkyloxy, alkoxyalkyloxy, arylalkoxyalkyloxy or cycloalkyloxy or R5 represents hydrogen, alkyl, substituted alkyl, cycloalkyl, aryl, arylalkyl, arylalkyloxyalkyl or R5 together with OR4 represents O(CH¿2?)nO wherein n is 2, 3 or 4; and R?3¿ represents hydrogen, halogen, alkyl or alkoxy or R3 together with R2 represents a moiety of formula (c) or an ester or amide thereof; providing that 4-[2-[2-hydroxy-3-(4-hydroxyphenoxy)propylamino]propyl] phenoxyacetic acid and salts and esters thereof and the examples disclosed in EP0328251 are excluded from the scope of formula (I); a pharmaceutical composition containing such a compound, a process of preparing such a compound and the use of such a compound in medicine.</p> |
