100642-98-6 Boc-leu(4)-aib-leu(4)-obzl L-Leucine, N-(N-(N-(N-(N-(N-(N-(N-(N-((1,1-dimethylethoxy)carbonyl)-L-leucyl)-L-leucyl)-L-leucyl)-L-leucyl)-2-methylalanyl)-L-leucyl)-L-leucyl)-L-leucyl)-, phenylmethyl ester tert-Butoxycarbonylleucyl-leucyl-leucyl-leucyl-aminoisobutyryl-leucyl-leucyl-leucyl-leucine benzyl ester