Using CCOc1ccc(Cc2nc3cc(C(=O)OC)cnc3n2CC2CC2)cc1 to produce CCOc1ccc(Cc2nc3cc(C(=O)O)cnc3n2CC2CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.