Using C[C@@H](c1ccc(-c2ccn(C)c(=O)c2)cc1)N1CCC2(CCC(=O)CC2)OC1=O to produce C[C@@H](c1ccc(-c2ccn(C)c(=O)c2)cc1)N1CCC2(CCC(O)CC2)OC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.