title: The pseudoguaianolides.
mesh_terms: D007783:Lactones / Q000032:analysis; D008722:Methods; D010946:Plants, Medicinal / Q000032:analysis; D013057:Spectrum Analysis; D013729:Terpenes / Q000302:isolation & purification*
chemical_list: D007783:Lactones; D013729:Terpenes