You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 8-[4-(2-pyridin-2-ylpyridin-4-yl)quinazolin-2-yl]-[1]benzothiolo[3,2-b]pyridine by IUPAC nomenclature, provide its molecular formula.
user
C29H17N5S
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