You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(2Z,4E)-4-(1-methylbenzimidazol-2-yl)hexa-2,4-dienyl]-[(2-methylpropan-2-yl)oxy]-propan-2-yloxyborane by IUPAC nomenclature, provide its molecular formula.
user
C21H31BN2O2
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