You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-N,4-N-diethyl-1-N-[4-(hydroxymethyl)cyclohexyl]-1-N-methylbenzene-1,4-dicarboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H30N2O3
assistant