1-{(2S)-2-[(6S,9S,12S)-9-(Aminocarbonyl)-6-(3-{[amino(imino)methyl]amino}propyl)-4,7,10-trioxo-2-oxa-5,8,11-triazabicyclo[12.2.2]octadeca-1(16),14,17-trien-12-yl]-2-hydroxyethyl}-L-prolyl-L-isoleucyl-L-valinamide AIDS-051263 AIDS051263 Macrocylic deriv.