Using COc1cc2c(cc1CCN1CCC3(CC1)OCCO3)N(C(C)=O)CCC2 to produce COc1cc2c(cc1CCN1CCC(=O)CC1)N(C(C)=O)CCC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.