Using CC1=C(c2ccccc2)C(=O)N(C(C)(C)C(=O)O)CO1, CC(C)N to produce CC1=C(c2ccccc2)C(=O)N(C(C)(C)C(=O)NC(C)C)CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.