title: Estimation of a steroid released from the crude saponins of the starfish, Asterias vulgaris, by solvolysis: seasonal and geographic abundance.
mesh_terms: D000818:Animals; D002852:Chromatography, Ion Exchange / Q000379:methods; D005843:Geography; D011283:Pregnenes / Q000032:analysis* / Q000378:metabolism; D012503:Saponins / Q000302:isolation & purification / Q000378:metabolism; D012621:Seasons; D013215:Starfish / Q000378:metabolism*
chemical_list: D011283:Pregnenes; D012503:Saponins