You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance ethane;methane;2-methylpyrazine;2-methylpyridine;3-methylpyridine;4-methylpyridine;4-methylpyrimidine;2'-methylspiro[cyclohexane-1,9'-fluorene];3'-methylspiro[cyclohexane-1,9'-fluorene];4'-methylspiro[cyclohexane-1,9'-fluorene] .
user
C116H189N7
assistant