Using COc1c(C)ccc2c1CC(Oc1ccc([N+](=O)[O-])cc1)C2=O to produce COc1c(C)ccc2c1CC(Oc1ccc([N+](=O)[O-])cc1)C2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.