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Figure 1
The structural formulae of (a) the benzimidazolone pigments and (b) the Hansa yellow pigments. For R2, R4 and R5 see Table 1[link]. [R^{\prime}_1], [R^{\prime}_2], [R^{\prime}_3] = —H, —Cl, —OCH3, —CH3 etc.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 65| Part 2| March 2009| Pages 200-211
doi:10.1107/S0108768108041529
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