You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (E)-3-[2-butyl-3-[(dipropylamino)methyl]-2,3-dihydroimidazo[1,2-a]pyridin-7-yl]-N-hydroxyprop-2-enamide into its molecular formula.
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C21H34N4O2
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