Using N=C(N)c1ccc2cc(OC(=O)c3ccc(CN)o3)ccc2c1, O=C(O)CCC(=O)O to produce N=C(N)c1ccc2cc(OC(=O)c3ccc(CNC(=O)CCC(=O)O)o3)ccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.