You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2S,3R,4S,5R)-2-[4-[10,15,20-tris[4-[(2S,3R,4S,5R)-3,4,5-trihydroxyoxan-2-yl]oxyphenyl]-21,23-dihydroporphyrin-5-yl]phenoxy]oxane-3,4,5-triol .
user
C64H62N4O20
assistant