Using COC(=O)c1cccc2[nH]c(NC(=O)c3ccc4c(c3)CCN(C(=O)OC(C)(C)C)C4)nc12 to produce CC(C)(C)OC(=O)N1CCc2cc(C(=O)Nc3nc4c(C(=O)O)cccc4[nH]3)ccc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.