You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named methyl 4-[[4-(6-methoxy-1-benzofuran-2-yl)-1,3-thiazol-2-yl]carbamoyl]benzoate by IUPAC nomenclature, provide its molecular formula.
user
C21H16N2O5S
assistant