You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[[(3aR,8aR)-2,2-dimethyl-4,4,8,8-tetraphenyl-3a,8a-dihydro-[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepin-6-yl]oxy]-3-methylphenyl]-diphenylphosphane is the IUPAC name of a molecule. Please give its molecular formula.
user
C50H44O5P2
assistant