You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 9-dibenzofuran-2-yl-2-(6,7-dihydrodibenzofuran-2-yl)-10,10a-dihydro-6H-benzo[c]thiochromene 5,5-dioxide by IUPAC nomenclature, provide its molecular formula.
user
C37H26O4S
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