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What is the molecular formula of the compound with this IUPAC name 2-N-ethynyl-1-N-[[4-[1-(2-methylcyclopenta-1,3-dien-1-yl)ethenylamino]-1H-pyrazol-5-yl]methyl]cyclohepta-1,3,5-triene-1,2-diamine ?
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C21H23N5
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