Using CCOC(=O)c1ccc(SCCn2c(-c3cccnc3)c(C)c3ccccc32)cc1 to produce Cc1c(-c2cccnc2)n(CCSc2ccc(C(=O)O)cc2)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.