(Z)-3-Methyl-oct-2-en-6-ynoic acid (2R,4R,6R)-2-methoxy-2-[(R)-3-(4-methoxy-benzyl)-2-oxo-thiazolidin-4-yl]-6-((S)-3-methyl-hex-4-ynyl)-tetrahydro-pyran-4-yl ester