You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 4-(3,5-dimethylpiperidine-1-carbonyl)-3,5-dimethyl-1-prop-2-enylpyrrole-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H30N2O3
assistant