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2-Hydr-oxy-1,6,7,8-tetra-meth-oxy-3-methyl-anthraquinone.

ABSTRACT: The title compound, C(19)H(18)O(7), also known as chrysoobtusin, was isolated from Cassia tora L. (Leguminosae). The anthraquinone ring system is almost planar, the dihedral angle between the two benzene rings being 4.27?(4)°. The structure is stabilized by intra- and inter-molecular O-H?O and C-H?O hydrogen bonds, and by weak ?-? stacking inter-actions along the b axis, with a centroid-centroid distance between related benzene rings of 3.800?(4)?Å.

SUBMITTER: Zhu LC

PROVIDER: S-EPMC2960471 | biostudies-literature | 2008 Jan

REPOSITORIES: biostudies-literature

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2-Hydr-oxy-1,6,7,8-tetra-meth-oxy-3-methyl-anthraquinone.

Zhu Li-Cai LC Zhao Zhen-Gang ZG Yu Shu-Juan SJ

Acta crystallographica. Section E, Structure reports online 20080104 Pt 2

The title compound, C(19)H(18)O(7), also known as chrysoobtusin, was isolated from Cassia tora L. (Leguminosae). The anthraquinone ring system is almost planar, the dihedral angle between the two benzene rings being 4.27 (4)°. The structure is stabilized by intra- and inter-molecular O-H⋯O and C-H⋯O hydrogen bonds, and by weak π-π stacking inter-actions along the b axis, with a centroid-centroid distance between related benzene rings of 3.800 (4) Å. ...[more]

PMID: 21201403

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