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 3,7-di(anthracen-9-yl)-12-hydroxy-4,5,6,7-tetrahydroiindeno[7,1-de:1',7'-fg][1,3,2]dioxaphosphocine 12-oxide .
user
C45H31O4P
assistant