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Translate the chemical IUPAC name 7'-(4-hydroxyphenyl)-3,8-dimethyl-5-prop-1-enylspiro[2,3,4,4a,5,8a-hexahydro-1H-naphthalene-6,2'-5H-furo[3,2-c]pyridine]-3',4'-dione into its molecular formula.
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C27H29NO4
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