Using O=C(CCc1oc(-n2cnc3ccccc32)nc1-c1ccc(Cl)cc1)N1CCSC1, C1CCOC1 to produce O=C(CCc1oc(-n2cnc3ccccc32)nc1-c1ccc(Cl)cc1)N1CCS(=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.