Using COC(=O)C1CCc2onc(-c3ccc(C(C)C)cc3)c2CC1 to produce CC(C)c1ccc(-c2noc3c2CCC(C(=O)O)CC3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.