AIDS-221833 AIDS221833 N'-[3-(7-Cyanomethoxy-1,1-dioxo-1,4-dihydrobenzo[1,2,4]thiadiazin-3-yl)-4-hydroxy-1-(3-methylbutyl)-2-oxo-1,2-dihydroquinolin-6-yl]-N,N-dimethylformamidine