[Methyl-((R)-4-methyl-2-methylamino-pentanoyl)-amino]-acetic acid tert-butyl ester

2,2,2-trichloroethyl (2S,8R,11S,14R,15S)-14-(((2E,5S,6R,7S,8E)-7-hydroxy-2,6,8-trimethyl-5-((methylthio)methoxy)undeca-2,8-dienoyl)oxy)-8-isobutyl-2,11-diisopropyl-6,9,15-trimethyl-4,7,10,13-tetraoxo-3,6,9,12-tetraazaheptadecanoate