2-((9R,12R,15S)-9-benzyl-6-(hydroxy(phenyl)methyl)-12-isobutyl-2,2,14,16-tetramethyl-4,7,10,13-tetraoxo-3-oxa-5,8,11,14-tetraazaheptadecan-15-yl)oxazole-4-carboxylic acid

Boc-β-OH-Phe-D-Phe-D-Leu-OH