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What is the molecular formula of the molecule (5a-ethenyl-3,9-dimethylidene-2,8-dioxo-3a,4,5,6,9a,9b-hexahydrofuro[2,3-f]isochromen-4-yl) 4-ethenyl-6-[2-(hydroxymethyl)prop-2-enoyloxy]-8-methylidene-9-oxo-2,10,18,19-tetraoxapentacyclo[14.2.1.01,13.04,12.07,11]nonadecane-16-carboxylate ?
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C38H40O14
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