You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2-dimethylalumanyloxy-1,1,2,2-tetraphenylethoxy)-dimethylalumane;2-methyl-4,4,5,5-tetraphenyl-1,3,2-dioxalumolane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C57H55Al3O4
assistant