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system
Please write the molecular formula of the molecule 2-diphenylphosphoryl-2',4'-diphenylspiro[fluorene-9,5'-indeno[1,2-d]pyrimidine];2-diphenylphosphoryl-2',4'-diphenylspiro[fluorene-9,9'-indeno[2,1-d]pyrimidine];2-diphenylphosphoryl-4'-naphthalen-1-yl-2'-phenylspiro[fluorene-9,5'-indeno[1,2-d]pyrimidine];4'-naphthalen-1-yl-7'-(4-naphthalen-2-ylphenyl)-2'-phenylspiro[fluorene-9,5'-indeno[1,2-d]pyrimidine];4'-naphthalen-1-yl-7'-(4-naphthalen-2-ylphenyl)-2'-phenylspiro[fluorene-9,9'-indeno[2,1-d]pyrimidine] .
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