You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(5-cyclopentyl-1H-pyrazol-3-yl)-3-propan-2-yl-[1,2,4]triazolo[4,3-a]pyrazin-8-amine into its molecular formula.
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C16H21N7
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