You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 3-chloro-N-[2-[4-(4-ethoxy-1,3-benzothiazol-2-yl)piperazin-1-yl]ethyl]benzamide into its molecular formula.
user
C22H25ClN4O2S
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