Using COc1cc(C(=O)N2CCN(C(=O)OC(C)(C)C)C(C(=O)N(C)C)C2)cc(OC)c1OC to produce COc1cc(C(=O)N2CCNC(C(=O)N(C)C)C2)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.