Using CC(C)(CO)C(=O)O, CC(C)(C)OC(=O)NC1CCC(N)CC1 to produce CC(C)(C)OC(=O)NC1CCC(NC(=O)C(C)(C)CO)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.