AIDS-081451 AIDS081451 Boc-Phe-His-LFA-Ile-Amp {(S)-1-[(S)-1-[(S)-1-(2,2-Difluoro-2-{(1S,2S)-2-methyl-1-[(pyridin-2-ylmethyl)-carbamoyl]-butylcarbamoyl}-ethanoyl)-3-methyl-butylcarbamoyl]-2-(3H-imidazol-4-yl)-ethylcarbamoyl]-2-phenyl-ethyl}-carbamic acid tert-butyl ester