Using COc1nc(N(C(=O)OC(C)(C)C)c2ccc3c(c2)COB3O)ccc1C#N to produce COc1nc(Nc2ccc3c(c2)COB3O)ccc1C#N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.