ethyl 2-((S)-1-(2-((S)-1-(2-iodothiazole-4-carboxamido)-3-(methylamino)-3-oxopropyl)-5-methylthiazole-4-carboxamido)-2-methylpropyl)-5-(methoxymethyl)thiazole-4-carboxylate

(S)-5-methoxymethyl-2-[2-methyl-1-(tritylamino)propyl]-thiazole-4-carboxylic acid ethyl ester