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What is the molecular formula of the compound with this IUPAC name 4-(cyclopropylamino)-2-[[(1E,4Z,6E)-2,9-dimethyl-3,8-dihydrodiazonin-6-yl]amino]imidazo[2,1-f][1,2,4]triazine-7-carbonitrile ?
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C18H21N9
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