You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-ethyl-3-[2-(furan-2-yl)ethyl]-2-[2-(4-methyl-1,4-diazepan-1-yl)ethyl]guanidine into molecular formula.
user
C17H31N5O
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