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Figure 6 A view of part of the crystal structure of (I), showing the formation of (22) and (30) rings. Atoms marked with an ampersand (&), a hash symbol (#), dollar sign ($), percent sign (%), or a star sign (*) are at the symmetry positions (2 − x, −y, 1 − z), (−x, 1 − y, −z), (1 − x, 1 − y, −z), (1 + x, y, z), (2 − x, 1 − y, 1 − z), respectively. |