Using CCCCOC(=O)[C@H]1CC[C@H](C(C)=O)CC1, Clc1ccc(Br)nc1 to produce CCCCOC(=O)[C@H]1CC[C@H](C(C)(O)c2ccc(Cl)cn2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.