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What is the molecular formula of the compound with this IUPAC name 18,18-dimethyl-15-thiaheptacyclo[14.11.0.02,14.04,12.05,10.017,25.019,24]heptacosa-1(16),2(14),3,5,7,9,12,17(25),19,21,23,26-dodecaene ?
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C28H20S
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