1,3-Diazepin-2-one deriv. AIDS-033378 AIDS033378 CU [4R-(4.alpha.,5.alpha.,6.beta.,7.beta.)]-Hexahydro-5,6-dihydroxy-1,3-bis(3-nitrobenzyl)-4,7-bis(phenylmethyl)-2H-1,3-diazepin-2-one