You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[(3,4-dichlorophenyl)methyl]-N-[2-(2-methoxyphenoxy)ethyl]piperidine-4-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C22H26Cl2N2O3
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