title: Pycnolide, a seco-germacradienolide from Liatris pycnostachya, and other antitumor constituents of Liatris species.
mesh_terms: D000970:Antineoplastic Agents / Q000302:isolation & purification*; D007783:Lactones / Q000302:isolation & purification*; D010936:Plant Extracts / Q000032:analysis; D013729:Terpenes / Q000302:isolation & purification*
chemical_list: D000970:Antineoplastic Agents; D007783:Lactones; D010936:Plant Extracts; D013729:Terpenes