You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-methyl-10-[4-(4-methylpiperazin-1-yl)sulfonylphenyl]-1,5,7,11-tetrazatricyclo[7.3.0.02,6]dodeca-2(6),3,7,9,11-pentaene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H22N6O2S
assistant