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Bioactive Natural Products Journal of Chemistry Bioactive Natural Products Guest Editors: A. Hamid A. Hadi, Mehmet Emin Duru, and Ana B. Martin-Diana Bioactive Natural Products Journal of Chemistry Bioactive Natural Products Guest Editors: A. Hamid A. Hadi, Mehmet Emin Duru, and Ana B. Martin-Diana Copyright © 2013 Hindawi Publishing Corporation. All rights reserved. This is a special issue published in “Journal of Chemistry.” All articles are open access articles distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is prop- erly cited. Contents Bioactive Natural Products, A. Hamid A. Hadi, Mehmet Emin Duru, and Ana B. Martin-Diana Volume 2013, Article ID 208507, 1 page C-Glycosidic Genistein Conjugates and Their Antiproliferative Activity,AleksandraRusin, Maciej Chrubasik, Katarzyna Papaj, Grzegorz Grynkiewicz, and WiesThlaw Szeja Volume 2013, Article ID 951392, 14 pages Optimization of Extraction of Natural Pigment from Purple Sweet Potato by Response Surface Methodology and Its Stability, Jinwei Li, Lianfu Zhang, and Yuanfa Liu Volume 2013, Article ID 590512, 5 pages Mechanism of Selective Inhibition of Yohimbine and Its Derivatives in Adrenoceptor 2Subtypes, Liu Hai-Bo, Peng Yong, Huang Lu-qi, Xu Jun, and Xiao Pei-Gen Volume 2013, Article ID 783058, 9 pages Secondary Metabolite Profile, Antioxidant Capacity, and Mosquito Repellent Activity of Bixa orellana fromBrazilianAmazonRegion, Annamaria Giorgi, Pietro De Marinis, Giuseppe Granelli, Luca Maria Chiesa, and Sara Panseri Volume 2013, Article ID 409826, 10 pages Acetylcholinesterase Inhibitory Activities of Flavonoids from the Leaves of Ginkgo biloba against Brown Planthopper, Xiao Ding, Ming-An Ouyang, Xiang Liu, and Rei-Zhen Wang Volume 2013, Article ID 645086, 4 pages Synthesis and Biological Activity of 2,5-Bisubstituted Derivatives of 1,3,4-Thiadiazol-2,5-dithiol, T.S.Zhivotova,R.E.Bakirova,S.D.Fazylov,S.K.Kabieva,andT.V.Kryazheva Volume 2013, Article ID 635079, 4 pages Acetylcholinesterase and Butyrylcholinesterase Inhibitory Activities of -Carboline and Quinoline Alkaloids Derivatives from the Plants of Genus Peganum, Ting Zhao, Ke-min Ding, Lei Zhang, Xue-mei Cheng, Chang-hong Wang, and Zheng-tao Wang Volume 2013, Article ID 717232, 6 pages The Extracts of Some Marine Invertebrates and Algae Collected off the Coast Waters of Vietnam Induce the Inhibitory Effects on the Activator Protein-1 Transcriptional Activity in JB6 Cl41 Cells, S. N. Fedorov, V. B. Krasokhin, L. K. Shubina, S. A. Dyshlovoy, N. H. Nam, and C. V. Minh Volume 2013, Article ID 896709, 6 pages Commercially Important Medicinal Plants of South Africa: A Review,R.A.StreetandG.Prinsloo Volume 2013, Article ID 205048, 16 pages Analysis of A-Type and B-Type Highly Polymeric Proanthocyanidins and Their Biological Activities as Nutraceuticals, Kazushige Yokota, Hideto Kimura, Satoshi Ogawa, and Takashi Akihiro Volume 2013, Article ID 352042, 7 pages The Inhibitory Effects of Aqueous Extract from Guava Twigs, Psidium guajava L., on Mutation and Oxidative Damage, Zhi-Chyang Kang, Ming-Tsung Yen, Chih-Kwang Chiu, Horng-Cherng Wu, Shu-Ling Huang, Shan-Pao Tai, and Bor-Sen Wang Volume 2013, Article ID 561905, 7 pages Nutritional and Phytochemical Study of Ilex paraguariensis Fruits, Laura Cogoi, M. Silvia Giacomino, Nestor Pellegrino, Claudia Anesini, and Rosana Filip Volume 2013, Article ID 750623,6 pages Hindawi Publishing Corporation Journal of Chemistry Volume 2013, Article ID 208507, 1 page http://dx.doi.org/10.1155/2013/208507 Editorial Bioactive Natural Products A. Hamid A. Hadi,1 Mehmet Emin Duru,2 and Ana B. Martin-Diana3 1 Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia 2 Department of Chemistry, Faculty of Arts and Sciences, Mugla University, 48187 Mugla, Turkey 3 School of Food and Environmental Health, Cathal Brugha Street, Dublin Institute of Technology, Dublin 2, Ireland Correspondence should be addressed to A. Hamid A. Hadi; [email protected] Received 22 May 2013; Accepted 22 May 2013 Copyright © 2013 A. Hamid A. Hadi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Bioactive natural products have never ceased to play an The inhibitory activity of plant and marine sources in important role in the search of novel therapeutic agents. cancer research are discussed in two papers. Z.-C. Kang Natural products from the nature such as the plant and et al. demonstrated the inhibitory effects of the aqueous marinesourcesformanintegralpartofthelivingsystem,and extract from guava twigs on mutation and oxidative damage, they have existed ever since the beginning of life. Therefore, it andS.N.Fedorovetal.describedtheinhibitoryeffectsof is undeniable that works related to natural products continue marine and algae extracts, thus supporting the role of natural to develop in many aspects involving researchers from vari- products in the management of cancer. ous scientific backgrounds. This special issue is dedicated to The role of natural products in the treatment of Alz- compile twelve articles on chemical and biological aspects of heimer’s disease has yet to be fully exploited. The study by research developments in natural products. T. Zhao et al. demonstrated the potential inhibitory activity Traditional medicinal plants still play a significant role against acetylcholinesterase (AChE) and butyrylcholinester- ase (BChE) of -carboline and quinoline alkaloids from the in health maintenance and well-being that contribute to the plants of genus Peganum. X. Ding et al. showed that the economic growth. This is well described by R. A. Street et flavonoids from the leaves of Ginkgo biloba, a traditional al. in his review on the commercially traditional medicinal Chinese medicinal plant, were found to inhibit AChE by plants of South Africa. The potential nutritional value of enhancing acetylcholine levels and its potential insecticidal Ilex paraguariensis fruits, a native tree from Northeastern activity against brown planthopper. Argentina, as source of novel foods and medicine, is discussed Natural product synthesis also contributes to the devel- by Laura Cogoi et al. opment of new therapeutic agents. T. S. Zhivotova et al. illus- The article by K. Yokota et al. explains the application trated the synthesis of 2,5-bi-substituted derivatives of 1,3,4- of ultraperformance liquid chromatography tandem mass tiadiazol-2,5-ditiol and some of their biological properties. A. spectrometry (UPLC) to determine the proportions of ter- Rusina et al. report on the synthesis of complex c-glycosides minal and extension units of A-type and B-type highly of genistein and their antiproliferative activities. polymeric proanthocyanidins. A. Giorgi et al. report on the Recent advances in molecular docking have enabled analysis of volatile organic compounds from a Brazilian flora researchers to investigate the inhibitory activity of bioactive by Headspace Solid-Phase Microextraction coupled with compounds. This is described by L. Hai-Boi et al. on the Gas Chromatography and Mass Spectrometry (HS-SPME mechanism of selective inhibition of yohimbine and its deri- GC/MS) and its antioxidant property and repellent activity vatives on adrenoceptor 2subtypes. against Aedes aegypti L. The paper by J. Li et al. discussed the optimum conditions for the extraction of natural pigment A. Hamid A. Hadi from purple sweet potato as an alternative natural source of Mehmet Emin Duru food coloring. Ana B. Martin-Diana Hindawi Publishing Corporation Journal of Chemistry Volume 2013, Article ID 951392, 14 pages http://dx.doi.org/10.1155/2013/951392 Research Article C-Glycosidic Genistein Conjugates and Their Antiproliferative Activity Aleksandra Rusin,1 Maciej Chrubasik,2 Katarzyna Papaj,2 Grzegorz Grynkiewicz,3 and WiesBaw Szeja2 1 Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Wybrzeze AK 15, 44-100 Gliwice, Poland 2 Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland 3 Pharmaceutical Research Institute, Rydygiera 8, 01-793 Warsaw, Poland Correspondence should be addressed to Wiesław Szeja; [email protected] Received 25 October 2012; Revised 22 March 2013; Accepted 2 April 2013 Academic Editor: Mehmet Emin Duru Copyright © 2013 Aleksandra Rusin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This paper presents our attempt to investigate scopes and the limitations of olefin cross-metathesis (CM) reaction in the synthesis of complex C-glycosides of genistein and evaluation of their antiproliferative activities. Novel genistein glycoconjugates were synthesized with the utility of CM reaction initiated by first and second generation of Grubbs catalysts. The relative reactivity of utilized olefins, based on categories proposed by Grubbs, was estimated. In vitro experiments in cancer cell lines showed that the selected derivatives (3a and 3f) exhibited higher antiproliferative potential than the parent compound, genistein, and were able to block the cell cycle in the G2/M phase. The observed mechanism
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