Burgess, Ryan & Wayne
(Cycloalkylamino)methylenebis(phosphonic acid)
 (Cycloalkylamino)methylenebis(phosphonic acid) represented by the general formula: ##STR1## in which, R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent a hydrogen atom or a lower alkyl group, and n represents an integer from 3 to 10, a lower alkyl ester thereof or a pharmaceutically acceptable salt thereof; and a bone-resorption inhibitor and an anti-arthritis containing the same. 
Yamanouchi Pharmaceutical Co., Ltd.
A C C
A61P C07F C07F
inventional inventional inventional
Shuichi Makoto Yasuo Tetsushi
Sakamoto Takeuchi Isomura Abe