You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (3-aminocyclohexyl)-(1,3-dimethyl-3,5-dihydro-2H-1,4-benzodiazepin-4-yl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C18H27N3O
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