You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named ethyl (2R,4S)-4-[(S)-[3,5-bis(trifluoromethyl)phenyl]-cyanomethyl]-2-ethyl-4-(trifluoromethyl)-2,3-dihydroquinoline-1-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C25H21F9N2O2
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