You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-(4-chlorophenyl)sulfonylpiperazin-1-yl]-[4-(3,4-dihydro-1H-isoquinolin-2-yl)phenyl]methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H26ClN3O3S
assistant