| 摘要 |
<IMAGE> wherein each R1 is independently hydrogen, C1-8 alkyl, cyclohexyl or C2-3 alkyl substituted by 1 or 2 substituents selected from halo, hydroxy, cyano, methoxy, ethoxy and (C1-2 alkoxy)-carbonyl, and each of R2 and R3 is independently hydrogen, chloro, bromo, methyl, methoxy or ethoxy, useful as pigments for, for example, the mass pigmenting of viscose and surface coatings such as oil and water base paints, lacquers and inks, pigment printing, textile coating and pigmenting paper in the mass.
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