Using CN1Cc2c(C3=CCC4(CC3)OCCO4)ccc([N+](=O)[O-])c2C1=O to produce CN1Cc2c(C3=CCC(=O)CC3)ccc([N+](=O)[O-])c2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.