Acta Cryst. (2013). E69, o1230 [ doi:10.1107/S1600536813016401 ]
Abstract: In the title compound, C18H18ClNO4, the imide group with its two alkyl substituents is approximately perpendicular to the plane of the naphthoquinone ring system [dihedral angle = 78.5 (1)°]. Further, the imide carbonyl groups are oriented in an anti sense. In the crystal, the substituted naphthoquinone rings form - stacks in the a-axis direction [perpendicular centroid-centroid distance = 3.209 (2) Å and slippage = 4.401 Å].
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