Using CC(C)(C)OC(=O)Nc1cccc(CCO)n1, COC(=O)CC(C)(C)Cc1ccc(O)cc1 to produce COC(=O)CC(C)(C)Cc1ccc(OCCc2cccc(NC(=O)OC(C)(C)C)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.