You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[(4-chlorophenyl)methyl]-2-[[2-(4-cyanophenyl)-2-hydroxypropoxy]methyl]-7-methyl-4-oxothieno[2,3-b]pyridine-5-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C27H24ClN3O4S
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