Using CCCC(NC(=O)Cc1ccc(C(=O)O)c(OCC)c1)c1ccccc1N1CCCCC1, CC(C)(C)O to produce CCCC(NC(=O)Cc1ccc(C(=O)OC(C)(C)C)c(OCC)c1)c1ccccc1N1CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.