You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,9S)-11-[(6-methyl-4-oxochromen-3-yl)methyl]-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H22N2O3
assistant