Using O=C([O-])[O-], CC(C)(C)OC(=O)N(CCc1ccccc1)[C@H]1c2cc3c(cc2OC(C)(C)[C@@H]1O)NC(=O)CO3 to produce CN1C(=O)COc2cc3c(cc21)OC(C)(C)[C@H](O)[C@H]3N(CCc1ccccc1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.