You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[9-(4-methyl-1,4-diazepan-1-yl)-2-tricyclo[9.4.0.03,8]pentadeca-1(15),3,5,7,9,11,13-heptaenylidene]acetonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H23N3
assistant