Using O=[N+]([O-])O, COCCOc1c(OC(=O)c2ccccc2)cccc1C(=O)OC to produce COCCOc1c(OC(=O)c2ccccc2)cc([N+](=O)[O-])cc1C(=O)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.