Using COC(=O)[C@@H](Cc1cc(C)c(N)c(N)c1)OC(=O)N1CCC(N2CCc3ccccc3NC2=O)CC1, COC(OC)(OC)OC to produce COC(=O)[C@@H](Cc1cc(C)c2[nH]c(OC)nc2c1)OC(=O)N1CCC(N2CCc3ccccc3NC2=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.