Using COC(=O)c1cc(-c2c(Br)cnn2C)c(C)o1, CB1OB(C)OB(C)O1 to produce COC(=O)c1cc(-c2c(C)cnn2C)c(C)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.