You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-acetyl-10-butoxy-3,4a,5a,7,12,12a-hexamethyl-5,6-dihydro-4H-tetracene-1,11-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H38O4
assistant