You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 10,20-bis(2,6-difluorophenyl)-5,15-bis(2,4,6-trimethylphenyl)-21,22-dihydroporphyrin using the IUPAC nomenclature.
user
C50H38F4N4
assistant