You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4-pyridin-4-yl-1,4,6,7-tetrahydroimidazo[4,5-c]pyridin-5-yl)-spiro[4,5-dihydrothieno[2,3-c]pyran-7,4'-piperidine]-2-ylmethanone;dihydrochloride into its molecular formula.
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C23H27Cl2N5O2S
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