Using CC(=O)Oc1ccccc1C(=O)Nc1sc2c(c1C(N)=O)CC(C)(C)OC2(C)C to produce CC1(C)Cc2c(sc(NC(=O)c3ccccc3O)c2C(N)=O)C(C)(C)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.