The asymmetric unit of the title cystosinium salt derivative, 2C4H6N3O+ - C4H4O62- cdot- H2O, contains two cytosinium cations, one tartaric acid anion and a water molecule. The two cytosinium cations are almost planar (r.m.s. deviations of the fitted atoms are 0.0151 and 0.0213 A? ). The crystal structure features C—HO, N—HO and O—HO interactions. Further C—O and – interactions are observed along the ab plane, contributing to the crystal stability.
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机译：标题胱氨酸盐衍生物2C4H6N3O +-C4H4O62- cdot-H2O的不对称单元包含两个胞嘧啶阳离子，一个酒石酸阴离子和一个水分子。两种胞嘧啶阳离子几乎是平面的（拟合原子的r.m.s.偏差为0.0151和0.0213 A 2）。晶体结构具有C-HO，N-HO和O-HO相互作用。沿ab平面观察到进一步的CO和-相互作用，有助于晶体稳定性。
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