Using O=C(Nc1cc(Cl)cc(Cl)c1)C1=C(O)N2CCCN=C2S1, CCOC(=O)CO to produce CCOC(=O)COC1=C(C(=O)Nc2cc(Cl)cc(Cl)c2)SC2=NCCCN21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.