2-(2,5-Dihydro-1H-pyrrol-1-yl)-11-ethyl-5-methyl-5,11-dihydro-6H-dipyrido[2,3-e:3',2'-b][1,4]diazepin-6-one AIDS-033568 AIDS033568 Dipyridodiazepinone 2-pyrroldin analog Nevirapine analog