Using COC(=O)/C=C1\COc2ccc(Br)cc2-c2nc(C(=O)OC)sc21 to produce COC(=O)CC1COc2ccc(Br)cc2-c2nc(C(=O)OC)sc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.