Bis(cinchonidinium) L-tartrate dihydrate
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Bis-(3R,4S,8S,9R)-cinchonidinium (2R,3R)-tartrate dihydrate, 2C(19)H(23)N(2)O(2)(+.)C(4)H(4)O(6)(2-).2H(2)O, is a hydrated salt of cinchonidine, in which the two protonated quinuclidinic nitrogen groups interact with the ionized carboxylate group of the tartrate; the latter has twofold symmetry. The water molecule interacts with the hydroxyl group of the cation and the O atoms of the carboxylate residues to afford a three-dimensional network structure.