Using CC(C)OB(OC(C)C)OC(C)C, Brc1cc2ccc3ccccc3c2c2ccccc12 to produce OB(O)c1cc2ccc3ccccc3c2c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.