www.thieme-connect.de/ejournals | www.thieme.de/fz/plantamedica Planta Medica August 2010 · Page 1163 – 1374 · Volume 76 12 · 2010 1163 Editorial 1177 Special Session: Opportunities and challenges in the exploitation of biodiversity – Complying with the principles of the convention on biological diversity th 7 Tannin Conference 1178 Short Lectures 1164 Lectures 1193 Posters 1165 Short Lectures 1193 Aphrodisiaca from plants 1193 Authentication of plants and drugs/DNA-Barcoding/ th 58 International Congress and Annual Meeting of PCR profiling the Society for Medicinal Plant and Natural Product Research 1197 Biodiversity 1167 Lectures 1208 Biopiracy and bioprospecting 1169 WS I: Workshops for Young Researchers 1169 Cellular and molecular mechanisms of action of natural 1208 Enzyme inhibitors from plants products and medicinal plants 1214 Fertility management by natural products 1171 WS II: Workshops for Young Researchers 1214 Indigenous knowledge of traditional medicine and 1171 Lead finding from Nature – Pitfalls and challenges of evidence based herbal medicine classical, computational and hyphenated approaches 1230 Miscellaneous 1173 WS III: Permanent Committee on Regulatory Affairs of Herbal Medicinal Products 1292 Natural products for the treatment of infectious diseases 1173 The importance of a risk-benefit analysis for the marketing authorization and/or registration of (tradi- 1323 New analytical methods tional) herbal medicinal products (HMPs) 1337 New Targets for herbal medicines 1174 WS IV: Permanent Committee on Biological and Pharmacological Activities of Natural Products 1350 Pharmacology 1174 Use of polyphenols against cardiovascular diseases 1175 WS V: Permanent Committee on Manufacturing and 1362 Authors’ Index Quality Control of Herbal Remedies 1175 The use of hyphenated techniques in the quality control of herbal medicinal products 1374 Masthead 1176 WS VI: Permanent Committee on Breeding and Cultivation of Medicinal Plants 1176 Biotechnology in breeding and cultivation of medicinal plants " Cover picture: Pixtal Abstracts 1163 7th Tannin Conference (Presymposium) and 58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research Date/Location: 29th August – 2nd September 2010, Berlin, Germany Chairman: Professor Dr. Matthias F. Melzig Professor Dr. Herbert Kolodziej The 58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research as well as the 7th Tannin Conference offered as presymposium will be held this year in Berlin, Germany. The congress venue is going to be the Henry Ford Building of the Freie Universitt Berlin, which is well equipped to host such an important scientific event. The objective of the 7th Tannin Conference (presymposium) is to promote further collaborations between chemists, biologists and human health related disciplines and to focus on expanded possibilities of polyphenols for their application in human health, nutrition, and the food industry. This meeting provides an opportunity for the members of the “tannin family" to discuss ideas with experts on herbal medicines and natural product chemistry and an exciting venue for GA participants to exchange scientific information. The specific objectives of the 58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research will be to promote dialogue and the exchange of medical practices and resources of modern and traditional nations. Alexander von Humboldt – born in Berlin and the foremost natural scientist of the early 19th century – was one of the pioneers of international scientific exchange. In 1828, he organised the first international scientific conference in Berlin, Germany, attended by about 600 participants from all over the world. This unique meeting was a model for many similar reunions in various countries in the following years. The focus was on the scientific exchange across borders – also addressed in the 58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research. Some selected main topics of the congress are: – New analytical methods – Authentication of plants and drugs/DNA-Barcoding/PCR profiling – New targets for herbal medicines – Enzyme inhibitors from plants – Natural products for the treatment of infectious diseases – Indigenous knowledge of traditional medicine and evidence based herbal medicine – Biopiracy and bioprospecting The programme of the Congress is offering nine invited lectures to be delivered by distinguished scientists, 60 short lectures which will be in parallel sessions and more than 650 poster presentations. In addition, seven workshops will be held on specific topics. As Presidents of the Congress, we are very happy that the scientific programme attracted so many scientists from approximately 70 different countries. Many thanks are most sincerely extended to Georg Thieme Verlag KG for the proper processing of the huge number of abstracts and to the agency CTW – Congress Organisation Thomas Wiese GmbH for organizing this Congress. We also express our gratitude to all members of the Scientific Committee who acted as reviewers and contributed to the good level of scientific quality of this abstract volume. We hope that everybody will enjoy their stay in Berlin, an attractive venue with international atmosphere and culture. Prof. Dr. Herbert Kolodziej Co-ordinator of the 7th Tannin Conference and President of the 58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research Prof. Dr. Matthias F. Melzig President of the 58th International Congress and Annual Meeting of the Society for Medicinal Plant and Natural Product Research Planta Med 2010; 76: 1163–1374 Georg Thieme Verlag KG Stuttgart · New York · ISSN 0032-0943 1164 7th Tannin Conference and 58th International Congress of the GA | 29th August – 2nd September 2010, Berlin, Germany 7th Tannin Conference A novel approach towards the syntheses of TC-3 proanthocyanidins and biflavonoids Lectures van der Westhuizen J, Mosoabisane T University of the Free State, Chemistry, Nelson Mandela Stereochemical structure determination of Avenue, 9301 Bloemfontein, South Africa complexes of tea catechins and caffeine TC-1 Ishizu T Oxidative condensation of tetra-O-methyl-3-oxocatechin and tetra-O- Fukuyama University, Faculty of Pharmacy and methylcatechin with silver tetrafluoroborate readily affords procyanidin Pharmaceutical Sciences, Sanzo, 1 Gakuen-cho, B-3 analogues with the 3,4-cis diastereomers predominating. The 3-oxo- 7290292 Fukuyama, Japan group deactivates the 8-position and no self condensation or oligomer- isation was observed [1]. This condensation suggests the oxidative bio- Catechins and caffeine are included in the leaves and buds of the tea synthesis of proantocianidins from flavan-3-ol precursors [2]. plant as major ingredients, and have various bioactivities. Interestingly, it is known that catechins form complexes with caffeine, especially in black tea and coffee. We have investigated stereochemical structures of the complexes of various tea carechins and caffeine by X-ray crystal- lography analysis. ()-Epicatechin (EC) of the non-gallated catechin and ()-epicatechin-3-O-gallate (ECg) of the gallated catechin, which are in- cluded in Japanese green tea as the major catechins, formed a 1:1 and 2:4 complexes with caffeine, respectively. The serious difference be- tween the forming modes of the two complexes occurred owing to the presence of the galloyl group. The p-p complexation site of EC with caffeine was only the A ring, whereas that of ECg was the all aromatic rings, the A, B, and B’ rings. Fig. 1: Lewis acid catalysed condensation of tetra-O-methyl-3-oxocate- chin and tetra-O-methylcatechin with tin chloride readily affords the first synthetic access to optically active 3-coupled biflavonoids. Acknowledgements: 1. Mimosa Central Co-Op, 2. THRIP. References: 1. Achilonu, M. et al. (2008) Org. Lett.10 (17): 3865 – 3868. 2. Weinges, K. et al. (1968) Annalen 711:184 – 186. Proanthocyanidin/polyphenol research: Fig. 1 trials and thrills TC-4 Ferreira D University of Mississippi, Pharmacognosy, PO Box 1848 443 Faser Hall University, United States Tannin conformation in solution: effects of tannin structure, solvent quality and oxidation The 5-deoxyproanthocyanidin pools of plants are of exceptional com- TC-2 Poncet-Legrand C1, Cabane B2, Vernhet A1 plexity. This is mainly due to extensive variation in hydroxylation pat- 1INRA, UMR SPO, 2, place Viala, bat 28, 34060 Montpellier tern as well as several regio-/stereo-chemical and conformational issues. cedex 01, France; 2CNRS, PMMH, 10 rue Vauquelin, 75231 Such structural complexities also complicate purification and structure Paris Cedex 05, France elucidation especially via NMR techniques where 1 H and 13C spin sys- tems are often broadened and/or multiplied due to the restricted con- Condensed tannins play an important part in the colour and taste of formational mobility of the interflavanyl bond. plant-based food. Their main properties derive from their oxidizability and their capacity to develop interactions with other biopolymers. Due to their chemical reactivity, tannins are not stable once extracted from plants. Various chemical reactions take place, leading to structural changes of the native structures to give so-called derived tannins and pigments. These changes likely have an impact on tannins physicochem- ical properties, including their