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What is the molecular formula of the compound with this IUPAC name 15-(6-acetylpyridin-3-yl)-5-hydroxy-9,9-dimethyl-8-oxa-13,15,17-triazatetracyclo[8.7.0.02,7.013,17]heptadeca-2(7),3,5,10-tetraene-14,16-dione ?
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C22H20N4O5
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