Risedronate USP RC A ;
[1-Hydroxy-2-(pyridin-2-yl)ethylidene]bis(phosphonic acid) monosodium salt ;
CAS # 105462-23-5 (acid anhydrous) ; 1220806-40-5 (acid monohydrate) ;
C7H11NO7P2 (acid) ; Mol. Wt.: 283.11 ;
C7H10NNaO7P2 (monosodium salt) ; Mol. Wt.: 305.09 ;