You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-N'-cyclopropyl-1-N-[(6-methyl-1H-benzimidazol-2-yl)methyl]cyclobutane-1,1-dicarboxamide into its molecular formula.
user
C18H22N4O2
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