| abstract |
There is provided a novel bisphosphonic acid compound having a remarkable inhibitory action against ectopic calcification or a salt thereof and a pharmaceutical composition containing the same. The bisphosphonic acid compound or a pharmaceutically acceptable salt thereof is represented by the general formula (1) Wherein the ------ moiety represents a single bond or a double bond, A represents a saturated cyclic hydrocarbon, or a saturated heterocycle containing a sulfur atom or an oxygen atom, and R 1 and R 2 are each independently A biphosphonic acid compound represented by the general formula (1) or a pharmaceutically acceptable salt thereof represented by the general formula (1): wherein R 1 represents an alkyl group, alkenyl group, alkynyl group, alkoxy group, aryloxy group, haloalkoxy group, haloalkyl group, halogen atom or hydrogen atom. |