hGGPPS-IN-2 is an analogue of C-2 substituted thienopyrimidinyl bisphosphonates (C2-ThP-BPs) and is a potent inhibitor of human geranylgeranyl pyrophosphate synthase (hGGPPS). hGGPPS-IN-2 targets multiple myeloma (MM) cells, induces selective apoptosis, and shows anti-myeloma effects in vivo. It has shown anti-myeloma effects in vivo.

Alendronic Acid (alendronate) is a nonhormonal medication used for osteoporosis, osteogenesis imperfecta, and several other bone diseases.

HGGPPS-IN-1 is an analogue of C-2-substituted thienopyrimidine-based bisphosphonates (C2-ThP-BPs). HGGPPS-IN-1 has an effective inhibitory effect on human geranyl geranyl pyrophosphate synthase (hGGPPS). HGGPPS-IN-1 can selectively induce apoptosis of multiple myeloma (MM) cells. HGGPPS-IN-1 showed anti-myeloma activity in vivo.

Sodium etidronate (Didronel) is a synthetic therapeutic diphosphonate analog of endogenous pyrophosphate. As a member of the family of drugs known as bisphosphonates, Sodium etidronate differs from endogenous pyrophosphate in its resistance to enzymatic hydrolysis. This agent adsorbs to hydroxyapatite cells and reduces the number of osteoclasts, thereby inhibiting abnormal bone resorption. Etidronate may also directly stimulate bone formation by osteoblasts.