You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2,4-dimethyl-1-phenylbenzene;ethane;methane;1-methyl-3-phenylbenzene;1-methyl-4-phenylbenzene;1,2-xylene;1,3-xylene;1,4-xylene by IUPAC nomenclature, provide its molecular formula.
user
C89H144
assistant