You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-chloro-N,N-dimethyl-6-[4-[3-(oxolane-2-carbonylamino)propyl]piperidin-1-yl]pyridine-3-carboxamide into molecular formula.
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C21H31ClN4O3
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