Using CCOC(=O)O[C@@H](C)n1nnc(-c2c(-c3ccc(C(=O)N(c4ncccc4C)[C@@H]4CCCN(C(=O)OC(C)(C)C)C4)cc3)cnn2C)n1 to produce CCOC(=O)O[C@@H](C)n1nnc(-c2c(-c3ccc(C(=O)N(c4ncccc4C)[C@@H]4CCCNC4)cc3)cnn2C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.