title: Quassinoid Bitter Principles.
mesh_terms: D007783:Lactones / Q000032:analysis* / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D010616:Phenanthrenes / Q000032:analysis / Q000378:metabolism; D010944:Plants / Q000032:analysis* / Q000378:metabolism; D013045:Species Specificity; D013329:Structure-Activity Relationship
chemical_list: D007783:Lactones; D010616:Phenanthrenes