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For the molecule named N-[2-(diethylamino)ethyl]-2-methyl-N-[2-oxo-2-[4-(6-phenylpyridazin-3-yl)-1,4-diazepan-1-yl]ethyl]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C27H40N6O2
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