You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(2S)-2-(1,3-benzothiazol-2-yl)pyrrolidin-1-yl]-N-(2,6-diethylphenyl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H27N3OS
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