| 摘要 |
Compounds of formula (I)and pharmaceutically acceptable salts and or metabolically labile derivatives thereof, wherein R1 represents C1-6 straight or branched chain alkyl, C1-6 straight or branched chain alkoxy, optionally substituted phenoxy, C3-6straight or branched chain alkenyloxy or C1-4 straight or branched alkoxy substituted by an optionally substituted phenyl group. C3-6 straight or branched chain alkenyl, optionally substituted phenyl, optionally substituted C3-7 cycloalkyl, C2-4 straight or branched chain alkyl substituted by (C1-4 alkoxy, C1-4 alkyl thio or halogen), C1-4 straight or branched chain alkyl substituted by (C1-4 alkoxycarbonyl, aryloxycarbonyl, cyano, optionally substituted C3-7 cycloalkyl, optionally substituted 5 or 6 membered heteroaryl, or 1 or 2 optionally substituted phenyl groups), a process for their preparation and their use in medicine.
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