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2-(Triethylsiloxy)-5-methyl-7-methoxynaphthalene-1-carboxylic acid (1R)-1alpha-hydroxy-4-[(4R)-2-oxo-1,3-dioxolane-4beta-yl]-8alpha-(triethylsiloxy)-4alpha,5alpha:9beta,10beta-diepoxybicyclo[7.3.0]dodecane-2,6-diyne-11alpha-yl ester


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