| abstract |
The invention concerns compounds of formula (I), in which SP is a spacer, Z is a valency bond, (a), (b), NH or S, A is hydrogen, a hydroxy group or an amino group which may be substituted by a lower-alkyl group, alk is a straight-chain or branched-chain alkylene group with 1-6 carbon atoms, R7 is hydrogen or a lower-alkyle group. The invention also concerns pharmacologically safe salts of such compounds, a method of preparing them, and drugs containing them for the treatment of osteoporosis. |