(4R,5S,6S,7R)-4,7-Dibenzyl-1,3-bis[(2,2-dioxido-1,3-dihydro-2,1,3-benzothiadiazol-5-yl)methyl]-5,6-dihydroxy-1,3-diazepan-2-one AIDS-044855 AIDS044855 Cyclic urea deriv.