Definition: Organic compounds which contain P-C-P bonds, where P stands for phosphonates or phosphonic acids. These compounds affect calcium metabolism. They inhibit ectopic calcification and slow down bone resorption and bone turnover. Technetium complexes of diphosphonates have been used successfully as bone scanning agents.
tiludronic acid [ Skelid,(4-chlorophenyl)thiomethylene bisphosphonic acid,(chloro-4-phenyl)thiomethylene biphosphonate,(chloro-4-phenyl)thiomethylene bisphosphonate,Cl2SMBP,tiludronate,tiludronate disodium ] a bone resorption inhibitor; an antihypercalcemic agent; used in the tratment of Paget's disease; used in the treatment and prevention of osteoporosis; structure given in first source