(2S)-N-(tert-Butyl)-1-{(2R)-2-hydroxy-2-[(10S,13S)-10-isopropyl-8,11-dioxo-2-oxa-9,12-diazabicyclo[13.2.2]nonadeca-1(17),15,18-trien-13-yl]ethyl}piperidine-2-carboxamide AIDS-051271 AIDS051271 Macrocylic deriv.