AIDS-059690 AIDS059690 CU Diazepine cyclic urea deriv. [4R-(4.alpha.,5.alpha.,6.beta.,7.beta.)]-Hexahydro-5,6-dihydroxy-1,3-bis(4-cyanobenzyl)-4,7-bis(phenylmethyl)-2H-1,3-diazepin-2-one