Geschmack ist vorhersagbar: Mit FlavorMiner. FlavorMiner heißt das Tool, das IPB-Chemiker und Partner aus Kolumbien jüngst entwickelt haben. Das Programm kann, basierend auf maschinellem Lernen (KI), anhand der…
Seit Februar 2021 bietet Wolfgang Brandt, ehemaliger Leiter der Arbeitsgruppe Computerchemie am IPB, sein Citizen Science-Projekt zur Pilzbestimmung an. Dafür hat er in regelmäßigen Abständen öffentliche Vorträge zur Vielfalt…
Thuy, T. T.; Porzel, A.; Ripperger, H.; Sung, T. V.; Adam, G.;Chalcones and ecdysteroids from Vitex leptobotrysPhytochemistry492603-2605(1998)DOI: 10.1016/S0031-9422(98)00411-7
In addition to some known chalcones and ecdysteroids three new chalcones have been isolated from aerial parts of Vitex leptobotrys, the structures of which have been identified as 2′,4′-dihydroxy-4,6′-dimethoxychalcone, 4′-hydroxy-4,2′,6′-trimethoxychalcone and 4,2′,4′,β-tetrahydroxy-6′-methoxy-α,β-dihydrochalcone, respectively.
Publikation
Quan, T. D.; Porzel, A.; Ripperger, H.; Sung, T. V.; Adam, G.;Photochemistry of Artemisinin DerivativesNat. Prod. Lett.12151-159(1998)DOI: 10.1080/10575639808048285
Photochemical reactivity of some oxoalkyl derivatives of dihydroartemisinin as well as the reaction of dihydroartemisinin with lead tetraacetate/iodine under visible light have been studied.
Publikation
Phuong, N. M.; Sung, T. V.; Schmidt, J.; Porzel, A.; Adam, G.;Capitelline - A New Indole Alkaloid from Hedyotis capitellataNat. Prod. Lett.1193-100(1998)DOI: 10.1080/10575639808041203
A new indole monoterpene alkaloid, named capitelline (1), was isolated from Hedyotis capitellata (Rubiaceae). Its structure was elucidated by spectroscopic data (1H- and 13C-NMR, MS, IR, UV).
Publikation
Lien, T. P.; Ripperger, H.; Porzel, A.; Merzweiler, K.; Sung, T. V.; Adam, G.;Indole alkaloids from tabernaemontana bovinaPhytochemistry491457-1461(1998)DOI: 10.1016/S0031-9422(98)00127-7
In addition to (-)-mehranine, hecubine, ibogaine, ibogaline, 19R-epi voacristine, 20-hydroxyconopharyngine and pedunculine the novel indole alkaloids 3-oxomehranine and 14α,15β-dihydroxy-N-methylaspidospermine have been isolated from the leaves and stems of Tabernaemontana bovina. The structure of 3-oxomehranine has been assigned by NMR investigations, the structure of 14α,15β-dihydroxy-N-methylaspidospermine by X-ray analysis and their absolute configurations by circular dichroism.