| 摘要 |
Diphosphonic acid derivatives of the formula <IMAGE> wherein X is cyano, 2-cyanoethyl, or 3- aminopropyl and Y is H, or X and Y together represent dimethylaminomethylene ((CH3)2NCH=), and R is hydrogen, alkyl of 1-4 carbon atoms, or a cation derived from a base, especially an alkali metal atom, excluding the cyanomethanebis (phosphonic acid diethyl ester), are pharmacologically active compounds. |
