Using CCOC(=O)Nc1ccc2c(c1)OCC(CN(C(C)=O)C(C)C)(OC(C)=O)CO2 to produce CCOC(=O)Nc1ccc2c(c1)OCC(O)(CNC(C)C)CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.