New 2-oxosparteine derivatives: Synthesis and spectroscopic characterization

New 2-oxosparteine derivatives: Synthesis and spectroscopic characterization Synthesis and Conformational Analysis of New 17-Alkyl Derivatives of Lupanine and Their Perchlorate Salts Oxidation Reaction of Bis-Quinolizidine System: Synthesis of New 2-Methyl-17-Oxosparteine and 2-Methyl-α-Isosparteine Synthesis and structure of (+)-2-thionosparteine, a new thioanalogue of lupanine Conformation of the CYP2D6 model substrate sparteine under physiological conditions Structure of lindenianine from Lupinus lindenianus Carbon‐13 NMR spectra of taxane‐type diterpenes: Oxiranes and oxetanes N-Oxides of Some Norditerpenoid Alkaloids Papilionaceous alkaloids—XXXVIII Contribution to the chemistry and stereochemistry of retamine Synthesis and Structure of Alkyl Derivatives of Convolvine