You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3-chlorophenyl)-1,6-dimethyl-3-thiophen-2-yl-6,7-dihydro-4H-pyrazolo[4,3-c]pyridine-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H19ClN4OS
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