You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(4a,9b-dihydrodibenzothiophen-4-yl)-4-(5,6-dihydrotriphenylen-2-yl)-[1]benzothiolo[3,2-d]pyrimidine into its molecular formula.
user
C40H26N2S2
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