Using Nc1nc(Cl)c2[nH]c(Cl)nc2n1, CC1(C)OC(=O)C2(CC2)C(=O)O1 to produce CC1(C)OC(=O)C(CCn2c(Cl)nc3c(Cl)nc(N)nc32)C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.