Abstract
Steroidal saponins have been isolated from a great number of terrestrial plants, but are uncommon animal constituents. In the animal kingdom they are almost ubiquitous in starfish, while they have been found only rarely in other marine animals. On the basis of their chemical structures, the starfish saponins may be subdivided into three main groups: the sulphated “asterosaponins”, usually penta- and hexaoligosides, based on 9(11),3β,6α-dihydroxysteroidal aglycones with a carbohydrate moiety at C-6; the cyclic glycosides, so far found only in two species of starfish; and the glycosides of polyhydroxysteroids. The latter compounds consist of a polyhydroxysteroidal aglycone linked to one or two sugar units. The glycosides of polyhydroxysteroids often co-occur with free polyhydroxysteroids as very complicated mixtures. These compounds have been found in both sulphated and non-sulphated forms. The starfish appear to be a rich source of new steroids.
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Kicha, A.A., Kalinovsky, A.I., Ivanchina, N.V., Stonik, V.A. (2000). Polyhydroxylated Steroidal Saponins from Asteroidea (Starfish) . In: Oleszek, W., Marston, A. (eds) Saponins in Food, Feedstuffs and Medicinal Plants. Proceedings of the Phythochemical Society of Europe, vol 45. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9339-7_7
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DOI: https://doi.org/10.1007/978-94-015-9339-7_7
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