6,6'-[[(4R,5S,6S,7R)-4,7-Dibenzyl-5,6-dihydroxy-2-oxo-1,3-diazepane-1,3-diyl]di(methylene)]bis(3,4-dihydroquinoxalin-2(1H)-one) AIDS-044858 AIDS044858 Cyclic urea deriv.