You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
11-(3-morpholin-4-ylpropylamino)-8-phenyl-3,4,8,10,12-pentazatricyclo[7.4.0.02,6]trideca-1(13),2(6),4,9,11-pentaen-7-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N7O2
assistant