You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-5-[[5-methyl-2-(4-methylbenzoyl)imino-1,3-thiazol-3-yl]methyl]furan-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H21N3O3S
assistant