You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [9-[2-carboxy-4-[(4-methylphenyl)methylcarbamoyl]phenyl]-6-(dimethylamino)xanthen-3-ylidene]-dimethylazanium .
user
C33H32N3O4+
assistant