You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(1-amino-2-oxobutyl)-N-(4-methoxy-7-morpholin-4-yl-1,3-benzothiazol-2-yl)benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26N4O4S
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