Using O=S([O-])[O-], COc1ccc2nccc(C(=O)CC[C@@H]3CCN(C(=O)OC(C)(C)C)C[C@@H]3CC=O)c2c1 to produce COc1ccc2nccc(C(=O)CC[C@@H]3CCN(C(=O)OC(C)(C)C)C[C@@H]3CC(=O)O)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.