You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-(3-chloro-4-ethoxy-5-methoxybenzoyl)-N-(4-methoxyphenyl)-1,3-thiazolidine-4-carboxamide .
user
C21H23ClN2O5S
assistant