Using CC(C)(C)NC(=O)C(=O)O, COc1cc(N)ccc1-c1cnco1 to produce COc1cc(NC(=O)C(=O)NC(C)(C)C)ccc1-c1cnco1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.