(2S)-2-((2S)-2-{2-[(3S,6S,9S,18S)-1,4,7,10,17,20-Hexaaza-18-(methylethyl)-2,5,8,11,16,19-hexaoxo-3,6,9-tris(4-aminobutyl)cyclohexacosyl]acetylamino}-6-aminohexanoylamino)-4-methylpentanoic acid AIDS-095261 AIDS095261 BCvir Cyclic Lys-Lys-Lys-Gly-Lys-Leu-NH2 deriv.