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Figure 3 Sphere models of the supra­molecular aggregation in the crystal structures of 6-fluoro-4-oxo-4H-chromene-3-carbaldehyde (A), 6-chloro-4-oxo-4H-chromene-3-carbaldehyde (B), 6-bromo-4-oxo-4H-chromene-3-carbaldehyde (C), and the title compound (D).

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ISSN: 2056-9890
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