You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule ethyl 1-(2-chlorophenyl)-5-[(E)-2-methoxyethenyl]-2-[(Z)-pent-3-en-2-yl]imidazole-4-carboxylate .
user
C20H23ClN2O3
assistant