Two New Structures of 5-Nitrouracil

The structure of monoclinic anhydrous 5-nitrouracil, C₄H₃N₃O₄, and of the solvate 5-nitrouracil dimethyl sulfoxide, C₄H₃N₃O₄.C₂H₆OS, are presented and compared with the previously known structures of the orthorhombic anhydrous form and the monohydrate.

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