You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(3,4-dimethylphenyl)-2-oxoethyl] 2-[(1R,2R,6R,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]benzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H23NO5
assistant