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Natural Product Research

Chang-Ling Hu, Juan Xiong, Peng Xu, Ke-Jun Cheng, Guo-Xun Yang, Jin-Feng Hu
During a further and comprehensive phytochemical investigation on the shed trunk barks of the critically endangered plant Abies beshanzuensis, one new (1) and ten known (2-11) lignans with diverse structures were isolated. On the basis of spectroscopic methods, the new structure was established to be (7S,8R,8'R)-4'-methoxyl-α-conidendrin (1). Among the isolated lignans, (-)-matairesinol (5) and (-)-arctigenin (6) showed significant anti-neuroinflammatory activities by inhibiting the overproduction of nitric oxide in lipopolysaccharide-stimulated murine BV-2 microglial cells, with IC50 values of 11...
October 23, 2016: Natural Product Research
Sara Guizzo, Cristina Tortolini, Federico Pepi, Francesca Leonelli, Franco Mazzei, Francesca Di Turo, Gabriele Favero
Traditional cleaning methods with organic solvents often are not suitable for removal of aged resin so researchers have to find new formulations. In this work, a case study is reported in which new microemulsions were applied on the surface of a painting covered by some aged resin layers used during a previous restoration. Based on the quality of the intervention and the analysis of a sample of the varnish carried out with both MALDI-TOF and ATR-IR spectrometers, it was conjectured that this undesired material could be an acrylic polymer...
October 23, 2016: Natural Product Research
Yan-Ming Wang, Jian-Qiang Zhao, Jun-Li Yang, Yan-Duo Tao, Li-Juan Mei, Yan-Ping Shi
A new flavonoid, along with 16 known ones, was separated from the aerial parts of Asterothamnus centrali-asiaticus. Their structures were elucidated by extensive spectroscopic methods, including 1D and 2D NMR techniques and HRESIMS. To confirm the structure of the new compound, computational prediction of its (13)C chemical shifts was performed. All of the 17 flavonoids were reported from A. centrali-asiaticus for the first time. In addition, all flavonoids were evaluated for their antioxidant and α-glucosidase inhibitory activities...
October 21, 2016: Natural Product Research
Shiyun Tang, Jianlian Shi, Chunbo Liu, Rui Jiang, Wei Zhao, Xin Liu, Nengjun Xiang, Yongkuan Chen, Qinpeng Shen, Mingming Miao, Zhihua Liu, Guangyu Yang
Three new phenylpropanoids, 3-(3,4-dimethoxy-5-methylphenyl)-3-oxopropyl acetate (1), 3-hydroxy-1-(3,4-dimethoxy-5-methylphenyl)propan-1-one (2), and 3-hydroxy-1-(4-methylbenzo[d][1,3]dioxol-6-yl) propan-1-one (3), together with three known phenylpropanoids (4-6) were isolated from the whole plant of Lavandula angustifolia. Their structures were determined by means of HRESIMS and extensive 1D and 2D NMR spectroscopic studies. Compounds 1-6 were tested for their anti-tobacoo mosaic virus (TMV) activities and cytotoxicity activities...
October 21, 2016: Natural Product Research
Xiu-Yun Zhang, Jing Shen, Yu Zhou, Zhi-Ping Wei, Jin-Ming Gao
Eleven known compounds, deoxymikanolide (1), 1,3-dihydroxyxanthone (2), kumatakenin (3), apigenin (4), chrysin (5), kaempferol (6), Iso-kaempferol (7), luteolin (8), luteolin-3',4'-dimethylether-7-O-β-glucoside (9), luteolin-7-O-β-glucoside (10) and quercetin (11) were identified in MeOH extract of Buddleja albiflora Hemsl (Oleaceae). These compounds (each, 1, 0.5 and 0.25 mg mL(-1)) were tested for insecticidal activity against 3rd and 4th-instar larvae of Plutella xylostella, 3rd-instar larvae of Mythimna separata and 3rd-instar larvae of Macrosiphoniella sanborni...
October 21, 2016: Natural Product Research
Yong-Fang Li, Xue-Bin Wu, Shah-Iram Niaz, Liu-Hong Zhang, Zhi-Jian Huang, Yong-Cheng Lin, Jing Li, Lan Liu
Two different culture media were used to cultivate fungus Aspergillus ruber 1017 and resulted in the isolation of one new compound (1) and 23 known compounds (2-24). Alkaloids were the major metabolite in soybean medium instead of anthraquinone from rice medium. The structures of these compounds were elucidated according to spectroscopic analysis and comparison with reported data. Antibacterial activities of compounds 1-12 against 12 aquatic bacteria were evaluated.
October 18, 2016: Natural Product Research
Mukul R Gupta, Alok Kumar, Naveen K Khare
Two new compounds 1 (Methyl 26-di-deoxy-6-methyl-β-D-allohexopyranoside) and 3 (3, 11, 12, 20 tetra-O-acetyl-pregn-5-ene-14β-ol) have been isolated from the chloroform-soluble extract of the whole plant of Marsdenia roylei (family: Asclepiadaceae) and their structures were determined by 1D, 2D NMR and ESI-MS as well as by chemical modification. We have calculated the molecular geometries, local reactivity descriptors by the density functional theory with B3LYP functional with basis set 6-311G+(d,2p) of 1, 3 and 4 (deacylated 3)...
October 18, 2016: Natural Product Research
Chin-Soon Phan, Charles Santhanaraju Vairappan
Four new bicyclogermacrenes, capgermacrenes D (1) E (2) F (3) and G (4) were isolated from a population of Bornean soft coral Capnella imbricata. The structures of these metabolites were elucidated based on their nuclear magnetic resonance and high-resolution electrospray ionisation mass spectrometry spectral data. These compounds showed bacteriastatic and bacteriacidal activities against Staphylococcus aureus and methicillin-resistant Staphylococcus aureus.
October 18, 2016: Natural Product Research
Weiyi Wang, Ruixuan Chen, Zhuhua Luo, Wei Wang, Jianming Chen
Two new benzoate derivatives, ethyl 3,5-dimethoxy-2-propionylbenzoate (1) and ethyl 3,5-dihydroxy-2-propionylbenzoate (2), and one new phenylacetate derivative, ethyl 3,5-dimethoxy-2-propionylphenylacetate (3), together with 9 known compounds, were isolated from the fermentation of Engyodontium album derived from deep sea sediment. Their structures were elucidated by spectroscopic techniques, such as NMR, IR and HRESIMS. Compound 3 exhibited inhibitory activities against methicillin-resistant Staphylococcus aureus ATCC 43300 (MRSA) and Vibrio vulnificus, with MIC values of 7...
October 18, 2016: Natural Product Research
Jian-Song Li, Min-Na Du, Hui Zhang, Ji Zhang, Shao-Yong Zhang, Hai-Yan Wang, An-Liang Chen, Ji-Dong Wang, Wen-Sheng Xiang
Two new milbemycin derivatives, 27-methoxylmilbemycin α31 (1) and 27-oxomilbemycin α31 (2), were isolated from the genetically engineered strain Streptomyces bingchenggensis BCJ60. Their structures were determined by 1D NMR, 2D NMR and HR-ESI-MS spectral analysis, and comparison with previous reports. The acaricidal and nematocidal capacities of compounds 1 and 2 were evaluated against Tetranychus cinnabarinus and Bursaphelenchus xylophilus, respectively. The results showed that the two new macrocyclic lactones 1 and 2 possessed potent acaricidal and nematocidal activities...
October 16, 2016: Natural Product Research
Houari Benamar, Lamberto Tomassini, Alessandro Venditti, Abderrazak Marouf, Malika Bennaceur, Mauro Serafini, Marcello Nicoletti
Four pyrrolizidine alkaloids, namely 7-O-angeloyllycopsamine N-oxide 1, echimidine N-oxide 2, echimidine 3 and 7-O-angeloylretronecine 4, were isolated for the first time from the whole plant ethanolic extract of Echium confusum Coincy, through bioassay-guided approach. Their structures were determined by spectroscopic means. All the isolates compounds showed moderate activities in inhibiting AChE, with IC50 0.276-0.769.
October 16, 2016: Natural Product Research
Zhu-Feng Geng, Kai Yang, Yin-Ping Li, Shan-Shan Guo, Chun-Xue You, Wen-Juan Zhang, Zhe Zhang, Shu-Shan Du
One sulphur-containing amide (N-[2-(4-Hydroxyphenyl)-ethyl]-3-methanesulfonyl-N-methyl-propionamide) which was isolated from Glycosmis lucida Wall ex Huang had a different NMR profile with this kind of compounds' normal case. Based on the information obtained by nuclear magnetic resonance pectroscopy (NMR) and mass spectrometry (MS), its configurations in solution were investigated. The results indicated that the compound would have two stable configurations in solution as the double bond switched between C-N and C-O in an appropriate rate...
October 14, 2016: Natural Product Research
Alessandro Venditti, Stanley E Ukwueze
Bidimensional NMR analysis may be a useful tool to resolve the structure of chemical compounds also in mixture. This letter would demonstrate how these techniques could be applied e.g. to the reported case on identification of benzophenone glycoside from Psidium guajava. A tentative structure for the secondary component, not yet described, was possibly proposed on the basis of observation and critic review of available 1D and 2D NMR spectra.
October 14, 2016: Natural Product Research
Venkatraman Sriramavaratharajan, Jeyamary Stephan, Veerappan Sudha, Ramar Murugan
Leaf essential oils (EOs) of Cinnamomum keralaense, an endemic species to Southern Western Ghats, India, were investigated. Leaves were collected from three distinct populations and hydro-distilled to obtain EOs, which were analysed by GC-FID and GC-MS. A total of 68 constituents was identified from three EOs. Wide variation was found in the composition of EOs. Ten major compounds were identified from three EOs, however, none of the compound was present in all three EOs as major constituent. High content of methyl eugenol (82...
October 14, 2016: Natural Product Research
Mariangela Rondanelli, Antonella Riva, Paolo Morazzoni, Pietro Allegrini, Milena Anna Faliva, Maurizio Naso, Alessandra Miccono, Gabriella Peroni, Irene Degli Agosti, Simone Perna
The study aimed to evaluate the effect of Zingiber officinale and Echinacea angustifolia extract supplementation (25 mg of ginger and 5 mg of Echinacea) for 30 days on inflammation and chronic pain in knee osteoarthritis (OA). Consecutive nonsteroidal anti-inflammatory-drugs (NSAIDs) poor responders with chronic inflammation and pain due to knee arthrosis were assessed (15 subjects, age: 67.2 ± 7.9, body mass index: 30.6 ± 7.1, men/women:2/13). The primary endpoint was to determine pain improvement from baseline to Day 30 by Tegner Lysholm Knee Scoring...
October 13, 2016: Natural Product Research
Ilhem Zebiri, Mohamed Haddad, Laurent Duca, Michel Sauvain, Lucie Paloque, Billy Cabanillas, Elsa Rengifo, Jean-Bernard Behr, Laurence Voutquenne-Nazabadioko
Eleven compounds were isolated from Poraqueiba sericea stems and identified as niga-ichigoside-F1 (1), trachelosperoside B1 (2), 4-epi-niga-ichigoside (7), 19α-hydroxyasiatic acid (3), myrianthic acid (4), hyptatic acid (5), trachelosperogenin B (6), arjunolic acid (8), and trachelosperogenin E (9), secologanoside (10) and secoxyloganin (11). Compounds 1-11 were tested for their antileishmanial activities against Leishmania infantum promastigotes, 1-6 and 8-11 were tested for their cytotoxic activities on fibroblasts, 1-3, 5-6, 8-11 were evaluated for their anti-elastase and anti-acetylcholinesterase assays activities by a spectrophotometric method and 1-2, 5 and 7-10 were tested using bioautography for their β-glucosidase...
October 13, 2016: Natural Product Research
Minju Joy, Kajal Chakraborty, Vamshi Krishna Raola
Marine bivalves occupy a leading share in the total edible molluscs at the coastline regions of south-eastern Asia, and are found to possess significant nutritional and biological potential. Various in vitro evaluation (antioxidant and anti-inflammatory) guided purification of ethyl acetate-methanol (EtOAc-MeOH) extract of bivalve clam, Paphia malabarica characterised two new sterol derivatives as 23-gem-dimethylcholesta-5-en-3β-ol (1) and (22E)-24(1),24(2)-methyldihomocholest-5,22-dien-3β-ol (2) collected from the south-west coast of Arabian Sea...
October 13, 2016: Natural Product Research
Nicola Cicero, Clara Naccari, Gaetano Cammilleri, Giuseppe Giangrosso, Antonello Cicero, Teresa Gervasi, Alessia Tropea, Ambrogina Albergamo, Vincenzo Ferrantelli
The decline of pollinating species is correlated to the extensive use of neonicotinoids against pest insects for crop protection. In this study, the concentrations of neonicotinoid insecticides were determined in honeybees, honeycomb and honey samples, collected in Spring 2015 (blooming period) from different areas in Sicily (IT), to carry out an evaluation of bees products' safety and an overview of neonicotinoid contamination in beekeeping. The results obtained showed only the presence of clothianidin in bee samples and these concentrations don't represent a risk for bees' vitality and safety...
October 13, 2016: Natural Product Research
Mahdi Moridi Farimani, Emad Nazarianpoor, Arezoo Rustaie, Maryam Akhbari
Phytochemical investigation of Cleome iberica DC. aerial parts led to the isolation and characterisation of six triterpenoid including glutinol (1), lupeol (2), β-sitosterol (3), cabraleadiol monoacetate (4), cabraleadiol (6) and daucosterol (8), one flavonoid, calycopterin (5) along with a fatty acid, tricosanoic acid (7). While studied samples showed weak potency in antimicrobial assessment, the acetone extract and some isolated compounds exhibited considerable cytotoxicity against cervical cancer cell line (HeLa) in MTT assay, among them calycopterin with IC50 equals to 5...
October 12, 2016: Natural Product Research
Fabio Sciubba, Damiano Avanzato, Angela Vaccaro, Giorgio Capuani, Mariangela Spagnoli, Maria Enrica Di Cocco, Irina Nikolova Tzareva, Maurizio Delfini
The metabolic profiling of pistachio (Pistacia vera) aqueous extracts from two different cultivars, namely 'Bianca' and 'Gloria', was monitored over the months from May to September employing high field NMR spectroscopy. A large number of water-soluble metabolites were assigned by means of 1D and 2D NMR experiments. The change in the metabolic profiles monitored over time allowed the pistachio development to be investigated. Specific temporal trends of amino acids, sugars, organic acids and other metabolites were observed and analysed by multivariate Partial Least Squares (PLS) analysis...
October 7, 2016: Natural Product Research
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