Cycloalkylamino methylenebis (phosphonic acid) and medicines containing the same as an active ingredients

摘要

(Cycloalkylamino)methylenebisphosphonic acids and esters (I) and salts thereof (wherein R, R<1>, R<2>, R<3> and R<4> are hydrogen or lower alkyl and n is an integer from 3 to 10) are bone-resorption inhibitor and anti-arthritic agents.