Using COCCN(C1CC(C)(C)Oc2ccc(O)cc21)S(C)(=O)=O, CCOCCCBr to produce CCOCCCOc1ccc2c(c1)C(N(CCOC)S(C)(=O)=O)CC(C)(C)O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.