You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-[(4-naphthalen-2-yl-1,3-thiazol-2-yl)carbamoyl]cyclopenten-1-yl]acetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H18N2O3S
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