Using CC(=O)OC(C)=O, CC(C)(C)OC(=O)NCCc1ccc(-c2csc(N)n2)cc1 to produce CC(=O)Nc1nc(-c2ccc(CCNC(=O)OC(C)(C)C)cc2)cs1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.