2-Chloro-5-thioxo-4,5,7,8,12,12a-hexahydroimidazo[4,5,1-jk]pyrrolo[1,2-d][1,4]benzodiazepin-10(11H)-one AIDS-044599 AIDS044599 Imidazopyrrolobenzodiazepinone deriv. TIBO deriv.