title: Berlandin and subacaulin, two new guaianolides from Berlandiera subacaulis.
mesh_terms: D002942:Circular Dichroism; D007259:Infrared Rays; D007783:Lactones / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D009904:Optical Rotation; D010936:Plant Extracts / Q000032:analysis; D013057:Spectrum Analysis; D013729:Terpenes / Q000302:isolation & purification*
chemical_list: D007783:Lactones; D010936:Plant Extracts; D013729:Terpenes