You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-N-(2-methoxy-4-methylphenyl)-3,3-dimethyl-2-(1-methylimidazol-2-yl)azetidine-1-carboxamide into its molecular formula.
user
C18H24N4O2
assistant