Using COC(=O)C(C)(C)NS(=O)(=O)c1ccc2c3c(oc2c1)CCCC3 to produce CC(C)(NS(=O)(=O)c1ccc2c3c(oc2c1)CCCC3)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.