You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-dimethyl-7-methylideneindole-5,6-diol;2,7-dimethyl-4-methylideneindole-5,6-diol;2,4-dimethyl-7-methylideneindol-6-ol;2,7-dimethyl-4-methylideneindol-5-ol;2-methyl-4,7-dimethylidene-1H-indole-5,6-dione;2,4,7-trimethyl-1H-indole;2,4,7-trimethyl-1H-indole-5,6-diol;2,4,7-trimethyl-1H-indol-5-ol;2,4,7-trimethyl-1H-indol-6-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C99H105N9O12
assistant