You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name (1S,4R,7R)-N-[(5-methylpyrazin-2-yl)methyl]-2-(5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyridine-3-carbonyl)-2-azabicyclo[2.2.1]heptane-7-carboxamide into its molecular formula.
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C20H25N7O2
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