Using CCOC(=O)COc1cccnc1CN, CC(C)(CC(=O)O)N1C(=O)c2ccccc2C1=O to produce CCOC(=O)COc1cccnc1CNC(=O)CC(C)(C)N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.