| 摘要 |
<p>A compound of formula (I) wherein R1 represents phenyl optionally substituted by one or more substituents selected from halogen, C¿1-3?alkyl, trifluoromethyl, nitro, cyano, -CO2R?a, -CONRaRb, -CORa, -SORc, -SO¿2Rc, -SO3H, -SO2NR?aRb, -ORa¿, -NHSO¿2R?c, -NHCORa and -NRaRb; R2 represents a C¿1-6?alkyl or C3-6alkenyl group; R?3¿ represents C¿1-3?alkyl; R?a and Rb¿ may each independently represent hydrogen or C¿1-3?alkyl or, when -NR?aRb¿ is directly attached to said phenyl, R?a and Rb¿ together with the nitrogen atom may form a 5- or 6- membered heterocyclic ring optionally containing a second heteroatom selected from oxygen or nitrogen, which second nitrogen heteroatom may optionally be further substituted by hydrogen or C¿1-3?alkyl; R?c¿ represents C¿1-3?alkyl; and salts and solvates thereof.</p> |
