You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(methylamino)-2-(1-methylpyrazol-4-yl)-N-[1-(5,6,7,8-tetrahydronaphthalen-2-yl)ethyl]acetamide into its molecular formula.
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C19H26N4O
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