You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-benzyl-7-methoxy-N-(4-methoxy-7-methyl-1,3-benzothiazol-2-yl)-1-benzofuran-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H22N2O4S
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