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What is the molecular formula of the compound with this IUPAC name 1-[6-[(1E)-1-aminobuta-1,3-dien-2-yl]-4-[1-[[(Z)-3-aminoprop-2-enylidene]amino]ethenyl]-1H-benzimidazol-2-yl]-3-ethylurea ?
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C19H23N7O
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