You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2-ethyl-5-methylpyrazole-3-carbonyl)amino]-7-(3-propan-2-yloxypropoxy)-3H-benzimidazole-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H28N6O4
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