You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-amino-N-[4-(3-amino-4-hydroxy-5-methylpiperidin-1-yl)pyridin-3-yl]-6-chlorofuro[3,2-b]pyridine-3-carboxamide into its molecular formula.
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C19H21ClN6O3
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