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2-Hydroxy-7-methoxy-5-methyl-1-naphthalenecarboxylic acid [(4S)-10beta-hydroxy-4alpha,5alpha-epoxy-4beta-(2-oxo-1,3-dioxolane-4-yl)bicyclo[7.3.0]dodeca-8,12(1)-diene-2,6-diyne-11alpha-yl] ester


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