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2-Hydroxy-5-methyl-7-methoxynaphthalene-1-carboxylic acid (1R)-1alpha,8alpha-bis(trimethylsiloxy)-4-[(4R)-2-oxo-1,3-dioxolane-4beta-yl]-4alpha,5alpha-epoxybicyclo[7.3.0]dodecane-9-ene-2,6-diyne-11alpha-yl ester


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