You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-(3,5-dichloropyridin-4-yl)piperazine-1-carbonyl]-3-(2-methoxyphenyl)-2-methyl-3-naphthalen-1-ylpropanenitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H28Cl2N4O2
assistant