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What is the molecular formula of the molecule 16,17-difluoro-21-[2-(4-methylpiperazin-1-yl)ethyl]-5,7-dioxa-11,21-diazapentacyclo[11.8.0.02,10.04,8.014,19]henicosa-1(13),2,4(8),9,11,14,16,18-octaen-20-one ?
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C24H22F2N4O3
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