Hydroxyanthracene

Hydroxyanthracenes are a class of natural phenolic compounds. They can be found in Cassia alata[1] and Cassia senna (sennosides A, B, C and D).[2]

Quinizarin is one of the most common synthetic hydroxyanthacenes.[3]

Chemical structure of sennoside A.

References

Distribution of hydroxyanthracene derivatives in Cassia alata and the factors affecting the quality of the raw material. Pharkphoom Panichayupakaranant and Niwan Intaraksa, Songklanakarin J. Sci. Technol., July-Aug. 2003, Vol. 25, No. 4, pages 497-502 (article)
WHO Monographs on Selected Medicinal Plants - Volume 1, 1999, 295 pages
Bien, H.-S.; Stawitz, J.; Wunderlich, K. "Anthraquinone Dyes and Intermediates". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_355.

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[1] Distribution of hydroxyanthracene derivatives in Cassia alata and the factors affecting the quality of the raw material. Pharkphoom Panichayupakaranant and Niwan Intaraksa, Songklanakarin J. Sci. Technol., July-Aug. 2003, Vol. 25, No. 4, pages 497-502 (article)

[2] WHO Monographs on Selected Medicinal Plants - Volume 1, 1999, 295 pages

[Ullmann-3] Bien, H.-S.; Stawitz, J.; Wunderlich, K. "Anthraquinone Dyes and Intermediates". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a02_355.