Christmann, M Organocatalytic syntheses of bioactive natural products. [electronic resource] - Ernst Schering Foundation symposium proceedings 2007 - 125-39 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Review Subjects--Topical Terms: AnimalsBiological ProductsCatalysisChemistry, Organic--methodsCombinatorial Chemistry TechniquesGonadal Steroid Hormones--chemistryKineticsLepidopteraModels, ChemicalMolecular ConformationMolecular StructurePyrrolizidine Alkaloids--chemical synthesisStereoisomerism