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(1R,4S,8S,9R,12S,13R,15R,17R)-9-Hydroxy-10-(hydroxymethyl)-3,14,14,17-tetramethyl-5,7-dioxapentacyclo[10.5.1.01,8.04,8.013,15]octadeca-2,10-diene-6,18-dione


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