(4R)-(—)-O-methyljoubertiamine and O-methyldihydrojoubertiamine, two minor alkaloids from Sceletium subvelutium L. Bolus

(4R)-(—)-O-methyljoubertiamine and O-methyldihydrojoubertiamine, two minor alkaloids from Sceletium subvelutium L. Bolus Joubertinamine: a novel seco-mesembrane alkaloid Sceletium alkaloids. Structures of five new bases from Sceletium namaquense Sceletium alkaloids. Structures of five new bases from Sceletium namaquense Sceletium alkaloids. Part 7. Structure and absolute stereochemistry of (–)-mesembrane and 3′-methoxy-4′-O-methyljoubertiamine, two minor bases from S. namaquense L. Bolus: X-ray analysis of (–)mesembrane hydrochloride monohydrate The biosynthesis of sceletium alkaloids in sceletium subvelutinum l. bolus Sceletium alkaloids. VI. Minor alkaloids of S. namaquense and S. strictum Alkaloids of Sceletium species. III. Structures of four new alkaloids from S. strictum Sceletorines A and B, two minor novel dimeric alkaloids of Mesembryanthemum tortuosum (synonym Sceletium tortuosum) Quettamine-type Alkaloids fromLeontice leontopetalum