You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 9-[(4-methylphenyl)methyl]-6-phenylmethoxy-4aH-pyrano[3,4-b]indole-3,4-dione is given. What is its corresponding molecular formula?
user
C26H21NO4
assistant