AIDS-170443 AIDS170443 N-{(1S)-2-[(5S,1R)-6-(Cyclopropylcarbonyl)-7-oxo-2,6-diazaspiro[bicyclo[3.3.0]octane-8,4'-cyclopentane]-9-en-2-yl]-1-(methylethyl)-2-oxoethyl}(tert-butoxy)carboxamide