1-{(2R)-2-[(6S,9S,12S)-9-(Aminocarbonyl)-6-(1H-imidazol-5-ylmethyl)-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-051262 AIDS051262 Macrocylic deriv.