Methlenediphosphonic acid derivatives, and antirheumatic pharmac

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Phosphorus containing other than solely as part of an...

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514 91, 514114, 546 24, 549 5, 549 7, 544 3, 544 54, C07F 938, C07F 958, C07F 965, A61K 3144

Patent

active

048762474

ABSTRACT:
The invention relates to methylenediphosphonic acid derivatives of the formula: ##STR1## in which: R.sub.1 represents:

REFERENCES:
patent: 3846420 (1974-11-01), Wollmann et al.
patent: 3962432 (1976-06-01), Schmidt-Dunker
patent: 4006182 (1977-02-01), Ploger et al.
patent: 4100167 (1978-07-01), Selvarajan et al.

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