N-methyl-2-bromo-(R)-tryptophanyl-O-tert-butyldimethylsilyl-(R)-β-tyrosine tert-butyl ester

methyl (R)-3-(2-bromo-1H-indol-3-yl)-2-(N-tert-butoxycarbonyl-N-methylamino)-propanoate

N-tert-butoxycarbonyl-N-methyl-2-bromo-(R)-tryptophan

N-tert-butyoxycarbonyl-N-methyl-2-bromo-(R)-tryptophanyl-O-tert-butyldimethylsilyl-(R)-β-tyrosine tert-butyl ester

(R)-methyl-2-((S)-2-((tert-butoxycarbonyl)amino)-N-methylpropanamido)-3-(1H-indol-3-yl) propanoate