(R)-2-({2-[(5E,7E)-(2R,4S)-9-((E)-(4R,5R)-5-Hydroxy-4,6-dimethyl-hept-2-enoylamino)-2,4-bis-methoxymethoxy-6-methyl-nona-5,7-dienyl]-oxazole-4-carbonyl}-amino)-propionic acid methyl ester