Using CCCc1c(C=O)cc([N+](=O)[O-])c(OC)c1OC, COC(OC)OC to produce CCCc1c(C(OC)OC)cc([N+](=O)[O-])c(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.