You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-(2-chlorophenyl)-3,4-dihydro-1H-isoquinolin-2-yl]-(2,4,6-trichlorophenyl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H15Cl4NO
assistant