You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-cyclohexylidene-N-[1-[(3-methyl-1,2,4-oxadiazol-5-yl)methyl]-2-oxoazepan-3-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H26N4O3
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