AIDS-058828 AIDS058828 BocAHPPA-Phe-Leu-Phe-OCH3 Methyl (2S)-2-((2S)-2-{(2S)-2-[(3S,4S)-4-({[(tert-butyl)oxycarbonyl]methyl}amino)-3-hydroxy-5-phenylpentanoylamino]-3-phenylpropanoylamino}-4-methylpentanoylamino)-3-phenylpropanoate