what are the chemical constituents of senna?

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S.M. Habibur rahman's picture

Answer: 
Senna contains anthraquinones including dianthrone glycosides (1.5% to 3%), sennosides A and B (rhein dianthrones), sennosides C and D (rhein aloe-emodin heterodianthrones). Numerous minor sennosides have been identified, and all appear to contribute to the laxative effect. The plant also contains free anthroquinones in small amounts including rhein, aloe-emodin, chrysophanol and their glycosides http://www.drugs.com/npp/senna.html#ixzz10Zsa30jq P. Bhaskara Rama Murti and T. R. Seshadri, Chemical composition of Indian senna leaves (Cassia angustifolia), PROCEEDINGS MATHEMATICAL SCIENCES, 1939,Volume 10, Number 2, 96-103,

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