AIDS-059693 AIDS059693 CU Diazepine cyclic urea deriv. [4R-(4.alpha.,5.alpha.,6.beta.,7.beta.)]-Hexahydro-5,6-dihydroxy-1,3-bis(3-methyl-2-butenyl)-4,7-bis(phenylmethyl)-2H-1,3-diazepin-2-one