You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(E)-3-methyl-1-[[(2S)-3-[(4-methylbenzoyl)amino]-2-(pyridine-2-carbonylamino)propanoyl]amino]but-1-enyl]boronic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27BN4O5
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