Using CCOC(=O)COC1=C(C(=O)Nc2cc(Cl)cc(Cl)c2)SC2=NCCCN21 to produce O=C(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.