You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(1-benzylpiperidin-4-yl)-8-(3,5-dimethyl-1,2-oxazol-4-yl)-7H-purin-6-amine by IUPAC nomenclature, provide its molecular formula.
user
C22H25N7O
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