You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(1R)-1-amino-3-methylbutyl]boronic acid;(2S)-4-methyl-2-[methyl(phenylmethoxycarbonyl)amino]pentanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C20H35BN2O6
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