You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name ethyl 2-ethenyl-4-methyl-5-(1-piperidin-4-ylethyl)-1-[(Z)-prop-1-enyl]pyrrole-3-carboxylate into its molecular formula.
user
C20H30N2O2
assistant