Using CC(C)(C)OC(=O)NC1CCN(C[C@@H]2Cn3c(=O)cnc4ccc(=O)n2c43)CC1 to produce NC1CCN(C[C@@H]2Cn3c(=O)cnc4ccc(=O)n2c43)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.