You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 3-[2-[3-(2,6-dimethylphenyl)phenyl]-2,3,4,5-tetrahydro-1-benzoxepin-7-yl]propanal is given. What is its corresponding molecular formula?
user
C27H28O2
assistant