(4.alpha.,5.alpha.,6.beta.,7.beta.)-3-[[3-[(3-Aminophenyl)methyl]hexahydro-5,6-dihydroxy-2-oxo-4,7-bis(phenylmethyl)-1H-1,3-diazepin-1yl]methyl]-N-(5-methyl-2-pyridinyl)benzamide AIDS-057013 AIDS057013 Cyclic urea deriv.