1-((8-((2-((2-Amino-3-phenylpropanoyl)amino)-3-(1H-indol-3-yl)propanoyl)amino)-2-benzyl-5-(1-tert-butoxyethyl)-16,16-dimethyl-4,7,14-trioxo-15-oxa-3,6,13-triazaheptadec-1-anoyl)amino)cyclopentanecarbo\txylic acid AIDS-146281 AIDS146281 NSC672664