Using CCCCCCN1CC2C(C1=O)C2(C)c1cccc(-c2ccccn2)c1 to produce CCCCCCN1CC2C(C1)C2(C)c1cccc(-c2ccccn2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.