2-[(4R,6S)-6-[(1E,3E)-5-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-2-methyl-penta-1,3-dienyl]-2-(2,4,6-trimethyl-phenyl)-[1,3]dioxan-4-ylmethyl]-oxazole-4-carboxylic acid methyl ester

(E)-(4R,5R)-5-((R)-2-tert-Butoxycarbonylamino-propionyloxy)-4,6-dimethyl-hept-2-enoic acid 2-trimethylsilanyl-ethyl ester