title: Sterol compositions of echinoids (sea urchin, sand dollar and heart urchin).
mesh_terms: D000818:Animals; D002784:Cholesterol / Q000031:analogs & derivatives / Q000032:analysis; D002845:Chromatography; D002849:Chromatography, Gas; D002855:Chromatography, Thin Layer; D003897:Desmosterol / Q000032:analysis; D004447:Echinodermata / Q000032:analysis*; D013058:Mass Spectrometry; D012617:Sea Urchins / Q000032:analysis; D012822:Silicon Dioxide; D013045:Species Specificity; D013261:Sterols / Q000032:analysis*
chemical_list: D013261:Sterols; D003897:Desmosterol; D012822:Silicon Dioxide; D002784:Cholesterol