Using COC(=O)/C=C/c1cnc(N2CCc3c(n(C(=O)OC(C)(C)C)c4ccccc34)C2)nc1 to produce COC(=O)CCc1cnc(N2CCc3c(n(C(=O)OC(C)(C)C)c4ccccc34)C2)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.