You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,3,7,8,12,13,17,18-octamethyl-5,10,15,20-tetraphenyl-2,3,22,24-tetrahydroporphyrin is the IUPAC name of a molecule. Please give its molecular formula.
user
C52H48N4
assistant