You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-methyl-7-[(E)-2-(6-methyl-4,4a,5,6-tetrahydronaphthalen-2-yl)ethenyl]-1,8a-dihydronaphthalene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H26
assistant