Using CCCc1c(OCc2cccc(N)c2)ccc(C(C)=O)c1O, COC(=O)c1cccc(C(=O)O)c1 to produce CCCc1c(OCc2cccc(NC(=O)c3cccc(C(=O)OC)c3)c2)ccc(C(C)=O)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.