1,3-Diazepine deriv. 183854-21-9 AIDS-043319 AIDS043319 SD146 [4R-(4.alpha.,5.alpha.,6.beta.,7.beta.)]-3,3'-[[Tetrahydro-5,6-dihydroxy-2-oxo-4,7-bis(phenylmethyl)-1H-1,3-diazepine-1,3(2H)-diyl]-bis(methylene)]bis[N-1H-benzimidazol-2-ylbenzamide]