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| Figure 1 . The molecular structure of (I). The ellipsoids are drawn at the 50% probability level and H atoms are shown as small spheres with arbitrary radii. The hydrogen bond is indicated by a dashed line. |
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| Figure 1 . The molecular structure of (I). The ellipsoids are drawn at the 50% probability level and H atoms are shown as small spheres with arbitrary radii. The hydrogen bond is indicated by a dashed line. |