You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methane;2-methyl-1H-benzimidazole;2-methyl-1H-imidazo[4,5-b]pyridine;2-methyl-3H-imidazo[4,5-c]pyridine;8-methyl-7H-purine .
user
C32H44N12
assistant