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2-Hydroxy-5-methyl-7-methoxynaphthalene-1-carboxylic acid (4S)-4-[(4R)-2-oxo-1,3-dioxolane-4beta-yl]-8alpha-hydroxy-4alpha,5alpha:9beta,10beta-diepoxybicyclo[7.3.0]dodecane-1(12)-ene-2,6-diyne-11alpha-yl ester


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