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Figure 4
(a) Two mol­ecules of 2 in the asymmetric unit viewed perpendicular to the pyran­oxanthone rings to highlight ππ stacking. The pyran­oxanthone core atoms of the first and second mol­ecules are labeled in black and gray, respectively. (b) Stacking of 2 in the unit cell. The unit cell is shown as a gray box where the b axis is parallel to the reader's view. The a and c axes and the origin center are labeled in the figure.

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COMMUNICATIONS
ISSN: 2056-9890
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