You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[5-[2-(9H-carbazol-3-yl)carbazol-9-yl]pyridin-3-yl]-8-oxa-3,13-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,5,10,12-hexaene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C39H23N5O
assistant