You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-N-(8-azaspiro[4.5]decan-3-yl)-5-chloro-2-N-methyl-4-N-(5-methyl-1H-pyrazol-3-yl)pyrimidine-2,4-diamine into its molecular formula.
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C18H26ClN7
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