Burgess, Ryan & Wayne
Heterocyclic bisphosphonic acid derivatives
A novel heterocyclic bisphosphonic acid derivatives represented by the following general formula (I): ##STR1## in which, .circle.Het means one of following (A) and (B): ##STR2## wherein a dotted line in (A) means that two adjacent atoms are bonded by a single bond or a double bond, ##STR3## wherein R.sup.6 and R.sup.7 may be the same or different, each represents a hydrogen atom, a lower alkyl group, a halogen atom or a hydroxyl group, PA0 R.sup.1 represents a hydrogen atom or a hydroxyl group, PA0 R.sup.2, R.sup.3, R.sup.4 and R.sup.5 may be the same or different, each represents a hydrogen atom or a lower alkyl group, PA0 "n" is 0 or 1, PA0 provided that "n" is 1 when the ring .circle.Het means (A), and "R.sup.1 " is a hydroxyl group when the ring .circle.Het means (B), PA0 or pharmaceutically acceptable salts thereof and bone resorption inhibitors containing the compound as an active ingredient.
Yamanouchi Pharmaceutical Co., Ltd.
C
C07F
inventional
Yasuo Makoto Tetsushi
Isomura Takeuchi Abe