title: Ecdysterone and ecdysone from Polypodium virginianum.
mesh_terms: D002170:Canada; D002782:Cholestenes / Q000302:isolation & purification*; D004440:Ecdysone / Q000302:isolation & purification*; D004441:Ecdysterone / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000032:analysis*
chemical_list: D002782:Cholestenes; D004440:Ecdysone; D004441:Ecdysterone