Using CCC(O)(CC(=O)OC(C)(C)C)c1ccnc(OC)c1OC to produce CCC(O)(CC(=O)OC(C)(C)C)c1cc[nH]c(=O)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.