You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methane;3-methyl-1,4,7-triazatricyclo[6.4.0.02,6]dodeca-2,5,7,9,11-pentaene;5-methyl-1,4,7-triazatricyclo[6.4.0.02,6]dodeca-2,5,7,9,11-pentaene;1,2,4-trimethylpyrrolo[3,4-b]indole;2,3,4-trimethylpyrrolo[3,4-b]indole is the IUPAC name of a molecule. Please give its molecular formula.
user
C48H54N10
assistant