You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named tert-butyl 3-[3-[7-chloro-5-(hydroxymethyl)-1,3-benzoxazol-2-yl]-2-methylsulfanylphenyl]-5,7-dihydro-4H-thieno[2,3-c]pyridine-6-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C27H27ClN2O4S2
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