You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[2-(2,4-dichlorophenyl)-4,4,4-trifluoro-1-hydroxybutyl]pyridine-2-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C16H11Cl2F3N2O
assistant