You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,3-dimethyl-13-(9-methyltetrazolo[1,5-a]quinolin-4-yl)-4,13-dihydro-2H-indazolo[1,2-b]phthalazine-1,6,11-trione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H22N6O3
assistant