123218-80-4 Boc-(phe-phe)4-och3 D-Phenylalanine, N-(N-(N-(N-(N-(N-(N-(N-((1,1-dimethylethoxy)carbonyl)-L-phenylalanyl)-D-phenylalanyl)-L-phenylalanyl)-D-phenylalanyl)-L-phenylalanyl)-D-phenylalanyl)-L-phenylalanyl)-, methyl ester tert-Butyloxycarbonylphenylalanyl-phenylalanyl-phenylalanyl-phenylalanyl-phenylalanyl-phenylalanyl-phenylalanyl-phenylalanine methyl ester