2,1-Benzisothiazole-1(3H)-acetic acid, 4-[2-(9-ethyl-5-methyl-9H-imidazo[1,2-d]dipyrido[2,3-b:3',2'-f][1,4]diazepin-12-yl)ethoxy]-, 2,2-dioxide AIDS-210671 AIDS210671