Patent ID: 6080860
Filing Date: 2000-06-27
Classification: C07D

Abstract:
A compound of the formula: ##STR79## wherein R.sub.a is hydrogen, R.sub.b is selected from the group consisting of hydrogen and a 2-cyano-4,5-dialkoxy phenyl group optionally substituted in the 6-position by an alkoxy group, and R.sub.c and R.sub.d are each hydrogen, provided R.sub.c and R.sub.d are not hydrogen when R.sub.a and R.sub.b are hydrogen, or R.sub.c and R.sub.d together with the nitrogen to which they are attached form a 6- or 7-membered closed ring optionally containing a second nitrogen, the closed ring being substituted on the optional second nitrogen by a member selected from the group consisting of unsubstituted or substituted furoyl, benzodioxanyl carbonyl, alkylthiooxadiazole carbonyl, hydroxy alkoxy carbonyl alkenyl and alkyroyl.