4,17-Dioxabicyclo[14.1.0]heptadecane-5,9-dione,10-ethyl-7,11-dihydroxy-3-[2-(hydroxymethyl)-5-benzothiazolyl]-8,8,12,16-tetramethyl-, (1S,3S,7S,10R,11S,12S,16R)-
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