(2R,3S,11'S,8'S)-3-[[[(3(S)-Tetrahydrofuranyl)carbonyl]amino]-4-phenyl-1-[[7',10'-dioxo-8'-(1-methylpropyl)-2'-oxa-6',9'-diazabicyclo[11.2.2]heptadeca-13',15',16'-trien-11-yl]amino]-butan-2-ol AIDS-030803 AIDS030803 Phe-Ile-Val Macrocyclic mimetic