Using CCOC(=O)c1sc(-c2ccc(OCC(C)C)c(C#N)c2)nc1C to produce Cc1nc(-c2ccc(OCC(C)C)c(C#N)c2)sc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.