You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[[8-(3-aminopiperidin-1-yl)-7-but-2-ynyl-3-methyl-2,6-dioxopurin-1-yl]methyl]naphthalene-1-carbonitrile into its molecular formula.
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C27H27N7O2
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