Using CCOC(C)=O, CSc1ncc(C=O)c(Nc2cccc(NC(=O)OC(C)(C)C)c2)n1 to produce CSc1ncc2ccc(=O)n(-c3cccc(NC(=O)OC(C)(C)C)c3)c2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.