Using C[C@@H]1C[C@@H](O)c2ncnc(N3CCNCC3)c21, CC(C)(C)OC(=O)N1CCC(C(=O)O)(c2ccc(Cl)cc2)C1 to produce C[C@@H]1C[C@@H](O)c2ncnc(N3CCN(C(=O)C4(c5ccc(Cl)cc5)CCNC4)CC3)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.