Using CC(C)(C)N, CC(C)N(C)c1nc2cc(C(=O)O)ccc2[nH]c1=O to produce CC(C)N(C)c1nc2cc(C(=O)NC(C)(C)C)ccc2[nH]c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.