Using CCOC(=O)c1cc2cccc(NS(=O)(=O)c3ccccn3)c2n1COC to produce COCn1c(C(=O)O)cc2cccc(NS(=O)(=O)c3ccccn3)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.