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(12Z,16E)-(3S,6R,7S,8S,15S)-3,7,15-tris-(tert-butyl-dimethyl-silanyloxy)-1-((S)-10,10-dimethyl-3,3-dioxo-3-thia-4-aza-tricyclo[5.2.1.0]dec-4-yl)-4,4,6,8,12,16-hexamethyl-17-(2-methyl-thiazol-4-yl)-heptadeca-12,16-diene-1,5-dione