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What is the molecular formula of the compound with this IUPAC name (1R,3'S,4'S,10S,14R,15R,16S,17S)-3'-hydroxy-4',5',5',10,14,16-hexamethylspiro[18-oxapentacyclo[13.3.2.01,14.02,11.05,10]icosa-2(11),3,5,12-tetraene-17,2'-oxolane]-7-one ?
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C28H36O4
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