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What is the molecular formula of the molecule 3-[10'-(5-ethenylcyclohepta-1,6-dien-1-yl)spiro[fluorene-9,2'-tricyclo[9.4.0.03,8]pentadeca-1(15),3,5,7,11,13-hexaene]-9'-yl]pyridine ?
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C41H33N
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