The invention provides myo-inositol deratives substituted with two or more phosphorothioate groups and selected from
myo-inositol-1,3-bisphosphorothioate;
myo-inositol-1,4-bisphosphorothioate;
myo-inositol-1,5-bisphosphorothioate;
myo-inositol-1,4,5-trisphosphorothioate; and
myo-inositol-1,3,4,5-tetrakisphosphorothioate.