1-{(2R)-2-[(8S,11S)-8-(2-Amino-2-oxoethyl)-6,9-dioxo-2-oxa-7,10-diazabicyclo[11.2.2]heptadeca-1(15),13,16-trien-11-yl]-2-hydroxyethyl}-N,N-diisopropyl-L-prolinamide AIDS-050837 AIDS050837 Asn-Phe-Pro Macrocylic deriv.