You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(2-methylimidazol-1-yl)methyl]-1-[[5-(1H-pyrazol-5-yl)thiophen-2-yl]methyl]piperidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H23N5S
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