You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[[(6-amino-5-ethanimidoylpyrimidin-4-yl)amino]methyl]-3,4-dihydro-1H-2-benzoborinine-2-carbonitrile;ethane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H31BN6
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