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

(E)-(4R,5R)-5-Methoxymethoxy-4,6-dimethyl-hept-2-enoic acid ethyl ester