You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2,9-dimethyl-7,9-diphenylfluorene;7-fluoro-1-methyl-9,9-diphenylfluorene;2'-fluoro-7'-methylspiro[cyclohexane-1,9'-fluorene];7-fluoro-1,9,9-trimethylfluorene;1-methyl-9,9-diphenylfluorene;2'-methyl-7'-phenylspiro[cyclohexane-1,9'-fluorene];2-methyl-7,9,9-triphenylfluorene;1,9,9-trimethylfluorene into molecular formula.
user
C187H159F3
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