You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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7-benzyl-8-[4-[(2,4-dichlorophenyl)methyl]piperazin-1-yl]-3-methyl-4,5-dihydropurine-2,6-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H26Cl2N6O2
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