You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[(3R)-2,3-dihydro-1,4-benzodioxin-3-yl]methyl]-2-[4-[(3-methylphenyl)methyl]piperazin-1-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H29N3O3
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