Using CC(C)(C)OC(=O)N1CCC(OCC=Cc2ccc(Cl)cc2)CC1 to produce CC(C)(C)OC(=O)N1CCC(OCCCc2ccc(Cl)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.