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(5S,6R,10S,11S,13R,16R)-16-Hydroxy-11,15,18,18-tetramethyl-10-(phenylmethoxymethoxy)-13-triethylsilyloxy-2,4-dioxatetracyclo[12.3.1.01,5.06,11]octadec-14-ene-3,7-dione


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