This invention relates to a compound of the formula: ##STR1## or a pharmaceutically acceptable salt thereof, wherein A and R.sup.1 are each an optionally substituted 5 to 6-membered heteroaryl, wherein the heteroaryl is optionally fused to a carbocyclic ring or 5 to 6-heteroaryl; R.sup.2 is NH.sub.2 ; R.sup.3 and R.sup.4 are each hydrogen, halo, (C.sub.1 -C.sub.4)alkyl optionally substituted with halo and the like; and X.sup.1 to X.sup.4 are each hydrogen, halo, hydroxy, (C.sub.1 -C.sub.4)alkyl optionally substituted with halo and the like. These compounds have COX-2 inhibiting activity and thus useful for treating or preventing inflammation or other COX-2 related diseases.

Esta invención se relaciona con un compuesto del fórmula: ## del ## STR1 o una sal farmacéutico aceptable de eso, en donde A y R.sup.1 son cada 5 opcionalmente substituidos al heteroaryl 6-membered, en donde el heteroaryl está fundido opcionalmente a un anillo carbocyclic o a 5 a 6-heteroaryl; R.sup.2 es NH.sub.2; R.sup.3 y R.sup.4 son cada hidrógeno, halo, (C.sub.1 - C.sub.4)alkyl substituyó opcionalmente con halo y los similares; y X.sup.1 a X.sup.4 son cada hidrógeno, halo, hydroxy, (C.sub.1 - C.sub.4)alkyl substituyó opcionalmente con halo y los similares. Estos compuestos tienen actividad que inhibe COX-2 y así útil para tratar o prevenir la inflamación u otras enfermedades relacionadas COX-2.

 
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