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 1,3-difluoro-2,5-dimethylbenzene;1,4-dimethylcyclohexane;1,4-dimethylcyclohexene;2,5-dimethyl-1,3-dioxane;2,5-dimethyloxane;2,5-dimethylpyridine;2,5-dimethylpyrimidine;2-fluoro-1,4-dimethylbenzene;3-fluoro-2,5-dimethylpyridine;1,4-xylene .
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C163H243F11N4O9
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