Nardoa tuberculata

Another class of compound that can be difficult to purify is the saponins found in Echinoderms. Almost all echinoderms examined to date contain either polyhydroxylated sterols or terpene glycosides, many of which contain sulfate ester functionality. The purification of compounds (Schemes 6-9) (40) from the starfish Nardoa tuberculata exemplifies the procedure most often used to purify these metabolites (Fig. 2). 

Bruno, I., Minale, L, Riccio, R., Cariello, L., Higa, T, and Tanaka, J (1993) Starfish saponins. Part 50. Steroidal Glycosides from the Okinawan starfish Nardoa tuberculata J. Nat. Prod. 56, 1057—1064. 

Other C20 polyunsaturated acids, regarded as oxylipins, have been isolated from several spedes, such as Culcita novaeguineae, Dermasterias imhricata, Nardoa tuberculata, Patiria miniata, and Pycnopodia helianthoides (D Auria et al, 1988 Bruno et al., 1992 Gerwick, Nagle, and Proteau, 1993). 

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