Using COC[C@H]1CN(C(=O)OC(C)(C)C)[C@H](C)CN1CC(=O)N1CC(C)(C)c2cnc(C3=CCCC3)cc21 to produce COC[C@H]1CN(C(=O)OC(C)(C)C)[C@H](C)CN1CC(=O)N1CC(C)(C)c2cnc(C3CCCC3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.