Using COCCCO, C[C@H](c1nc2ccccc2c(=O)[nH]1)N(C(=O)[C@H]1CN(C(=O)OC(C)(C)C)CCO1)C1CC1 to produce COCCCc1nc([C@@H](C)N(C(=O)[C@H]2CN(C(=O)OC(C)(C)C)CCO2)C2CC2)nc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.