Using O=[PH](c1ccc(N2CCCC2)cc1)c1ccc(N2CCCC2)cc1 to produce c1cc(N2CCCC2)ccc1Pc1ccc(N2CCCC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.