Using O=C(O)c1ccon1, Cn1c(=O)n(CC(C)(C)C)c2ccc(C3CC4CCC3CN4)nc21 to produce Cn1c(=O)n(CC(C)(C)C)c2ccc(C3CC4CCC3CN4C(=O)c3ccon3)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.