You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4,6-diphenyl-2-(2-spiro[fluorene-9,9'-xanthene]-4'-ylpyridin-3-yl)pyrimidine;4,6-diphenyl-2-(6-spiro[fluorene-9,9'-xanthene]-4'-ylpyridin-2-yl)pyrimidine;4,6-diphenyl-2-(6-spiro[fluorene-9,9'-xanthene]-4'-ylpyridin-3-yl)pyrimidine;4-phenyl-6-(2-phenylphenyl)-2-[3-(3-spiro[fluorene-9,9'-xanthene]-4'-ylphenyl)phenyl]pyrimidine into molecular formula.
user
C197H125N11O4
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