Using COC(=O)c1nc(C2CCCN2C(=O)OC(C)(C)C)nc(O)c1OC(=O)c1ccccc1, CI to produce COC(=O)c1nc(C2CCCN2C(=O)OC(C)(C)C)n(C)c(=O)c1OC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.