Using CCc1nn(Cc2cccc(C)n2)c2cccc(NC(=O)c3cnc4cc(C(=O)O)ccn34)c12, CC(C)(C)OC(=O)NN to produce CCc1nn(Cc2cccc(C)n2)c2cccc(NC(=O)c3cnc4cc(C(=O)NNC(=O)OC(C)(C)C)ccn34)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.