3,6,10,13,16-Pentaazaeicosane-1,20-dioic acid, 15-cyclohexyl-12-(2-methylpropyl)-4,7,8,11,14,17-hexaoxo-2,19-diphenyl-9-propyl-, 1-(phenylmethyl) ester, (2S,9S,12S,15S)- AIDS-115600 AIDS115600