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 5-[4-(3-methyloxiran-2-yl)phenyl]-10,15,20-tris[4-(oxiran-2-yl)phenyl]-21,23-dihydroporphyrin .
user
C53H40N4O4
assistant