You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[[[2-chloro-5-[(2-fluoro-6-methylanilino)methyl]pyridin-4-yl]amino]methyl]piperidin-1-yl]-methylborinic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H27BClFN4O
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