You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-chloro-5-(trifluoromethyl)phenyl]-5-oxo-4-pyridin-3-yl-2-pyrrol-1-yl-4,6,7,8-tetrahydroquinoline-3-carbonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H18ClF3N4O
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