1-{(2S)-2-[(4R,7S,13R)-13-(Acetylamino)-7-(2-amino-2-oxoethyl)-6,9,12-trioxo-1,2-dithia-5,8,11-triazacyclotetradecan-4-yl]-2-hydroxyethyl}prolylisoleucyl-L-valinamide AIDS-050813 AIDS050813 Cys-Gly-Asn-Cys(HEA)-Pro-Ile-Val