You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[1-[[(3S)-7-chloro-2,3-dihydro-1-benzofuran-3-yl]methyl]imidazol-4-yl]-4-(5-methyl-2H-triazol-4-yl)pyridine by IUPAC nomenclature, provide its molecular formula.
user
C20H17ClN6O
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