You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [5-[4-[(1S)-1-hydroxyethyl]phenyl]furan-2-yl]methyl-(pyridin-2-ylmethyl)azanium is given. What is its corresponding molecular formula?
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C19H21N2O2+
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