Compounds of the formula wherein X in each of formulas (1) and (2) represents a substituted or unsubstituted alkylene, alkenylene, or alkynylene
linker of 2-6C; Y is of the formula or a stereoisomer thereof, wherein R1 is substituted or unsubstituted
alkyl; each R2 is independently H, hydroxy, alkoxy (1-6C) or lower
alkyl (1-4C); R3 is H, hydroxy, or alkoxy (1-6C); or Y is of the formula wherein each n is 1, Z is N, K comprises a substituted or unsubstituted aromatic carbocyclic or heterocyclic ring
system which may optionally be spaced from the linkage position shown in formula (7) by a
linker of 1-2C, or in formula (7), Z may be spaced from the carbon bonded to X by ═CR6— wherein R6 is H or linear, branded or cyclic
alkyl (1-6C), R5 is H or linear, branched or cyclic alkyl, and R′ represents a cation, H or a substituted or unsubstituted alkyl group of 1-6C, promote
bone formation and are thus useful in treating
osteoporosis,
bone fracture or deficiency, primary or
secondary hyperparathyroidism,
periodontal disease or defect, metastatic
bone disease, osteolytic
bone disease, post-
plastic surgery, post-
prosthetic joint surgery, and post-dental implantation. Also disclosed is a method to identify additional compounds which are inhibitors of enzymes in the isoprenoid scheme especially of HMG-CoA
reductase which results in
prenylation of proteins and in the synthesis of steroids or of inhibitors of their production which are useful in treating bone disorders.