You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[[(4S)-1-(3-cyanopropyl)-3-methoxypiperidin-4-yl]methyl]-5-methoxy-2,3-dihydro-1,4-benzodioxine-8-carboxamide into its molecular formula.
user
C21H29N3O5
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