title: Thiospiran, C309 Nuphar alkaloids. Structure and evidence for intramolecular sulfur-ammonium ion interactions.
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D000900:Anti-Bacterial Agents / Q000032:analysis*; D002244:Carbon; D003903:Deuterium; D007477:Ions; D007553:Isotope Labeling; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010946:Plants, Medicinal / Q000378:metabolism*; D013056:Spectrophotometry, Ultraviolet; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D013455:Sulfur
chemical_list: D000470:Alkaloids; D000900:Anti-Bacterial Agents; D007477:Ions; D013455:Sulfur; D002244:Carbon; D003903:Deuterium