Using COC(=O)c1c(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)ccc2c1OCc1occc1-2 to produce COC(=O)c1c(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)ccc2c1OC[C@@H]1OCC[C@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.