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What is the molecular formula of the compound with this IUPAC name 8-(4-tert-butylphenyl)-10-(furan-2-yl)-2,4,5,6,7,11,12-heptazatricyclo[7.4.0.03,7]trideca-1(9),3,5,10-tetraen-13-one ?
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C20H19N7O2
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