You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(2-chlorophenyl)-N-(3-methoxypropyl)-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinoline-8-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H25ClN2O2
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