Compounds of general formula (I): where A, E, G, X, Y and the bond - - - take various meanings are of use in the preparation of a pharmaceutical formulation, for example in the treatment of a disease in which GSK-3 is involved, including Alzheimer's disease or the non-dependent insulin diabetes mellitus, or hyperproliferative disease such as cancer, displasias or metaplasias of tissue, psoriasis, arteriosclerosis or restenosis.