Using C=C(C)c1cc2c(c3cn[nH]c13)CN(CC(C)(C)C)C(=O)[C@H](CC(=O)OC)C2 to produce COC(=O)C[C@@H]1Cc2cc(C(C)C)c3[nH]ncc3c2CN(CC(C)(C)C)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.