You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[2-(2,3-dihydrothiophen-2-yl)ethyl]-3,6,8,9-tetrahydropyrazolo[4,3-f][2,7]naphthyridine-7-carboxamide into its molecular formula.
user
C16H19N5OS
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