Using COC(=O)[C@@H]1Cc2ccc(OC)cc2CN1C(=O)OC(C)(C)C to produce COc1ccc2c(c1)CN(C(=O)OC(C)(C)C)[C@H](C(=O)O)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.