You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-tert-butyl-3-methyl-9H-fluorene;3-tert-butyl-2-methyl-9H-fluorene;6-tert-butyl-7-methyl-9H-indeno[2,1-b]pyridine;8-tert-butyl-7-methyl-5H-indeno[1,2-b]pyridine;6-tert-butyl-7-methyl-9H-indeno[2,1-c]pyridine;8-tert-butyl-7-methyl-5H-indeno[1,2-c]pyridine;ethane;methane into molecular formula.
user
C117H156N4
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