4-Amino-N-{(2R)-2-hydroxy-2-[(9S,12S)-9-isopropyl-7,10-dioxo-2-oxa-8,11-diazabicyclo[12.2.2]octadeca-1(16),14,17-trien-12-yl]ethyl}-N-(3-methylbutyl)benzenesulfonamide AIDS-051274 AIDS051274 Macrocylic deriv.