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Title
Crystal structure of diaqua-(N-(1-(pyrazin-2-yl)ethylidene)nicotinohydrazonato-κ<sup>3</sup>N,N′,O)-bis(nitrato-κ<sup>2</sup>O,O′)samarium(III), C<sub>12</sub>H<sub>14</sub>N<sub>7</sub>O<sub>9</sub>Sm.