You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-acetyl-2-[4-[2-(1,4-dihydrocyclohepta[b]pyrrol-3-yl)-2-oxoethyl]piperazin-1-yl]-5-(methylamino)-3-propylimidazole-4-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H33N7O3
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