2-[(4R,6S)-6-((E)-2-Methyl-3-oxo-propenyl)-2-(2,4,6-trimethyl-phenyl)-[1,3]dioxan-4-ylmethyl]-oxazole-4-carboxylic acid methyl ester

2-(trimethylsilyl)ethyl (4R,5R,E)-5-(((2-(((4R,6S)-6-((1E,3E)-5-(1,3-dioxoisoindolin-2-yl)-2-methylpenta-1,3-dien-1-yl)-2-mesityl-1,3-dioxan-4-yl)methyl)oxazole-4-carbonyl)-D-alanyl)oxy)-4,6-dimethylhept-2-enoate