A study of the alkaloids ofVeratrum lobelianum
Conclusions1) At the beginning of vegetation, the total alkaloids in the epigeal part ofVeratrum lobelianum is 2.5% of the weight of the dry raw material, and at the end of vegetation, 0.036%.2) The new alkaloids veralosine, veralosinine, and veralosidine have been isolated from the epigeal part of the plant.3) On the basis of a study of chemical properties, IR, UV, NMR, and mass spectra, and also its conversion into tetrahydrosolasodine, structure and configuration I has been proposed as the most probable for veralosidine.
Structure of a new ester-alkaloid from Veratrum grandiflorum (Maxim.) Loesener fil. (Alkaloids of Japanese Veratrum genus plants. IV.).
A new ester-alkaloid isolated from the rhizomes of Veratrum grandiflorum (MAXIM.) LOESENER fil., m.p. 235°, [α]15D-10.9°, was found to be 16-angelate of the alkamine which had been obtained from Veratrum oxysepalum TURCZ. and characterized by Shimizu as zygadenilic acid δ-lactone.
Solanum-alkaloide : XVIII. Dünnschichtochromatographie von solanum-steroidalkaloiden und steroidsapogeninen
The application of thin-layer chromatography to the separation of mixtures of seven steroidal Solanum alkaloids (solanidine, demissidine, tomatidenol, tomatidine, solasodine, soladulcidine, solanocapsine), four of their derivatives (5α-solanidan-3- one, 5α-tomatidan-3-one, 5α-solasodan-3-one, solasodiene) as well as of ten steroidal sapogenins has been investigated. Two further steroidal alkaloids (jervine, conessin) and some phytosterols and triterpenes have also been studied. The above-mentioned steroids can be resolved into groups by simple adsorption chromatography on thin layers of silica gel. Some possibilities for a further differentiation of these groups are described.