(3S,4E)-3-hydroxy-4-methyl-5-(2-methyl-1,3-thiazol-4-yl)pent-4-enoic acid

(3S,6R,7S,8S)-3,7-Bis-(tert-butyl-dimethyl-silanyloxy)-11-{[(E)-(S)-3-hydroxy-4-methyl-5-(2-methyl-thiazol-4-yl)-pent-4-enoyl]-methyl-amino}-4,4,6,8-tetramethyl-5-oxo-undecanoic acid methyl ester