Using O=[O+][O-], Cc1ncccc1NC(=O)c1ccc2c(c1)CC[C@@H]1C[C@@](O)(c3ccccc3)[C@](C)(O)C[C@@]21Cc1ccccc1 to produce Cc1ncccc1NC(=O)c1ccc2c(c1)C(=O)C[C@@H]1C[C@@](O)(c3ccccc3)[C@](C)(O)C[C@@]21Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.