Using CC(C)(C)N, CCOC(=O)N1C2CCC1CC(C(=O)O)(C1CCCCC1)C2 to produce CCOC(=O)N1C2CCC1CC(C(=O)NC(C)(C)C)(C1CCCCC1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.