3-Cyclohexyl-2,5-dioxo-12.-oxa-1,4-diazatricyclo[11.5.3.0.]-henicosa-13(21),14,16,(20)-triene-18-carboxylic acid[1-[dimethylcarbamoylphenylmethyl)carbamoyl]methyl)aminooxalyl)butyl)amide AIDS-160098 AIDS160098