Unexpected formation of hydroxybiphenylmethane derivatives and some new observations on Labat test.

abstract：:The use of natural products as a diet supplement is increasing worldwide but sometimes is not followed by adequate sanitary controls and analyses. Twenty samples of pills and capsules of lyophilised cyanobacteria (blue-green algae), commercialised in Italy as dietary supplements, were found positive at the Vibrio fisc...

journal_title：Natural product research

authors： Bruno M,Fiori M,Mattei D,Melchiorre S,Messineo V,Volpi F,Bogialli S,Nazzari M

更新日期：2006-07-20 00:00:00

abstract：:Two new myrsinol-type diterpene polyesters 3,5,13,17-tetra-O-acetyl-7-O-benzoyl-15-hydroxymyrsinol (1) and 3,5,13,17-tetra-O-acetyl-7-O-butanoyl-13-hydroxymyrsinol (2), with a tricyclic carbon skeleton have been isolated from Euphorbia decipiens Boiss. & Buhse. The structure elucidation of the isolated compounds was b...

journal_title：Natural product research

authors： Ahmad VU,Hussain J,Hussain H,Farooq U,Farmanullah,Lodhi MA,Choudhary MI

更新日期：2005-04-01 00:00:00

abstract：:Resinous exudate obtained from the aerial parts of Adesmia boronioides Hook.f. were evaluated to determine anti-phytopathogenic effects. Briefly, resinous exudate was obtained by dipping fresh plant material in dichloromethane; chemical composition was determined by GC-MS; and minimum inhibitory concentration (MIC) an...

journal_title：Natural product research

authors： Montenegro I,Valenzuela M,Zamorano N,Santander R,Baez C,Madrid A

更新日期：2019-08-06 00:00:00

abstract：:The Aedes aegypti mosquito is one of the major vectors of arboviruses. These diseases have re-emerged and the insecticides used nowadays are toxic to mammals and environment and have only been effective in the short-term. In this context, natural products are an alternative. The genus Piper has many active compounds a...

journal_title：Natural product research

authors： Macedo AL,Duprat RC,Moreira DL,Kaplan MAC,Vasconcelos TRA,Pinto LC,Montenegro RC,Ratcliffe NA,Mello CB,Valverde AL

更新日期：2018-11-01 00:00:00

abstract：:A new cycloartane triterpene bisdesmoside, soulieoside T (1), and one known compound, oleanolic acid (2), were isolated from the ethanolic extract of the rhizomes of Actaea vaginata. Their structures were elucidated by spectroscopic methods and by comparison with data reported in the literature. Compound 1 was evaluat...

journal_title：Natural product research

authors： Zhang M,Yang Q,Zhang X,Wu H

更新日期：2019-12-10 00:00:00

abstract：:This manuscript describes the antioxidant activity of essential oil of Cinnamon (Cinnamomum zeylanicum) bark extracted by supercritical fluid extraction (SCFE), hydro distillation and steam distillation. The cinnamon bark essential oil exhibited a wide range of total phenolic contents, total flavonoid contents, reduci...

journal_title：Natural product research

authors： Saleem M,Bhatti HN,Jilani MI,Hanif MA

更新日期：2015-01-01 00:00:00

abstract：:A new dolabellane diterpenoid (1R*,3E,7E,9S*,11S*,12Z)-9-hydroxydolabella-3,7,12-triene (1), along with seven known compounds (2-8), has been isolated from the Hainan soft coral Spongodes sp. Their structures were elucidated on the basis of spectroscopic analysis and compared with those previously reported in literatu...

journal_title：Natural product research

authors： Yan XH,Jia R,Shen X,Guo YW

更新日期：2007-08-01 00:00:00

abstract：:Chronic neuroinflammation is a key component of many neurodegenerative disorders. Chronic activation of this process produces pro-inflammatory cytokines, prostaglandins and reactive oxygen species that induce brain injury and neuronal dysfunction. Agave species contain saponins, compounds with anti-inflammatory activi...

journal_title：Natural product research

authors： Herrera-Ruiz M,Jiménez-Ferrer E,Tortoriello J,Zamilpa A,Alegría-Herrera E,Jiménez-Aparicio AR,Arenas-Ocampo ML,Martínez-Duncker I,Monterrosas-Brisson N

更新日期：2019-05-14 00:00:00

abstract：:Two new ergosterol derivatives namely, chlamydosterols A [(22E,24R)-ergosta-7,22-diene-3β,5α,6β-triol 6-decanoate] (1) and B [5α,6β,25-trihydroxy-(22E,24R)-ergosta-7,22-dien-3-one] (5) and three known ergosterols: ergosta-7,22-dien-3β-ol (2), ergosta-5,7,22-triene-3β-ol (3), and ergosta-7,22-diene-3β,5α,6β-triol (4) w...

journal_title：Natural product research

authors： Al-Rabia MW,Mohamed GA,Ibrahim SRM,Asfour HZ

更新日期：2020-05-06 00:00:00

abstract：:Three new methylated flavonol glucosides: 3-methoxy-7-O-β-(6″-galloylgluco-pyranoside) quercetin (1), 3,4'-dimethoxy-7-O-β-(6″-galloyl-glucopyranoside) quercetin (2) and 3-methoxy-7-O-β-(6″-galloylgluco-pyranoside) kaempferol (3), in addition to six known flavonols, were isolated from the ethyl acetate extract of Fuma...

journal_title：Natural product research

authors： Laraoui H,Long C,Haba H,Benkhaled M

更新日期：2013-01-01 00:00:00

abstract：:A phytochemical investigation on Lagotis brevituba led to the isolation and characterisation of 11 phenolic compounds: p-hydroxy-benzoic acid 1, methyl 3,4-dihydroxybenzoate 2, vanillic acid 3, protocatechuic acid 4, caffeic acid 5, glucose ester of (E)-ferulic acid 6, p-coumaric acid 7, vanillin 8, diosmetin-7-O-β-d-...

journal_title：Natural product research

authors： Yuan X,Wen H,Cui Y,Fan M,Liu Z,Mei L,Shao Y,Wang Y,Tao Y

更新日期：2017-02-01 00:00:00

abstract：:A new diterpenoid, 15-epi-(4E)-jatrogrossidentadione acetate, along with several known constituents has been isolated from the stem of Jatropha multifida. The structure of the new compound was settled by a detailed analysis of its 1D- and 2D-NMR spectra. ...

journal_title：Natural product research

authors： Das B,Satya Kumar A,Narayan Kumar J,Venugopal Raju T

更新日期：2010-10-01 00:00:00

abstract：:In the present study, hydroxy-2-methyl-4H-pyran-4-one was isolated from the methanol root extract of Senecio laetus and was identified by FT-IR, 1H, 13C NMR and GC-MS. The larvicidal potential of the compound 3-hydroxy-2-methyl-4H-pyran-4-one was evaluated against the 4th instar larvae of Anopheles stephensi, Aedes ae...

journal_title：Natural product research

authors： Ali SI,Venugopalan V

更新日期：2019-06-27 00:00:00

abstract：:Protein kinase C (PKC) plays a key role in neurotransmission in the central nervous system, and targeting PKC domain is considered as a strategy to modulate the anaesthetic effects. In this study, we described a synthetic pipeline to perform high-throughput virtual screening against a large library of 3D structural na...

journal_title：Natural product research

authors： Zhao J,Zhou C

更新日期：2015-01-01 00:00:00

abstract：:Biotransformation of corosolic acid (1) by Cochliobolus lunatus and Streptomyces asparaginoviolaceus afforded four metabolites, which were identified by using (1)H NMR, (13)C NMR, DEPT, HSQC, HMBC and NOESY spectral data. Biotransformation of corosolic acid by C. lunatus R.R. Nelson & Haasis CGMCC 3.4381 produced thre...

journal_title：Natural product research

authors： Feng X,Li DP,Zhang ZS,Chu ZY,Luan J

更新日期：2014-01-01 00:00:00

abstract：:In this article, an ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry method was developed to detect the chemical structures of proanthocyanidins (PAs) from seed coats of Schisandra chinensis. The cleavage pathways of the compounds were revealed. The structures of S. chinensis PAs, in...

journal_title：Natural product research

authors： Yan T,Hu GS,Wang AH,Hong Y,Jia JM

更新日期：2014-01-01 00:00:00

abstract：:One new iridoid glycoside, 6',10-di-O-(4-hydroxybenzoyl) aucubin (1), together with ten known compounds, including five diterpenoids (2-6), two triterpene glucosides (7-8) and three methoxylated flavonoids (9-11) were isolated from the fruits of Vitex rotundifolia. Compounds (3, 4, 7, and 8) were reported for the firs...

journal_title：Natural product research

authors： Zhao YY,Guo L,Cao LJ,Zhang J,Yin ZQ

更新日期：2017-11-01 00:00:00

abstract：:An HPLC/DAD/ESI-MSn method was established to characterise flavonoids in the seeds of Sophora alopecuroides L. All the flavonoids exhibited abundant [M-H]- ions, which triggered data-dependent multistage mass spectrometry fragmentations. Characteristic UV spectra were used to confirm flavonoid subtypes. In total, 22 f...

journal_title：Natural product research

authors： Yang WZ,Ye G,Meng AH,Sabir G,Qiao X,Guo DA,Ye M

更新日期：2013-03-01 00:00:00

abstract：:An actinomycete strain 200-09, isolated from a soil sample collected from the coast of Hawaii, USA, was identified as Streptomyces antibioticus on the basis of its morphological, physiological and biochemical characteristics as well as 16S rDNA analysis. A new antimycin-type antibiotic, kitamycin C (1), together with ...

journal_title：Natural product research

authors： Wang F,Fu SN,Bao YX,Yang Y,Shen HF,Lin BR,Zhou GX

更新日期：2017-08-01 00:00:00

abstract：:Methylphophorbide a (MPa) has been isolated from the ethanol extract of the wheat grass plant. Its antioxidative efficacy is evaluated by hydroxyl radical scavenging activities and reducing capacity which are significantly up regulated in comparison with aqueous extract of the plant. The compound shows iron-binding ca...

journal_title：Natural product research

authors： Das P,Mandal S,Gangopadhyay S,Das K,Mitra AG,Dasgupta S,Mukhopadhyay S,Mukhopadhyay A

更新日期：2016-01-01 00:00:00

abstract：:Pectins were isolated from bark, wood and pith of kenaf (Hibiscus cannabinus L.) variety Cuba108. Imidazole was used as extractant. The isolated pectins were studied by 13C nuclear magnetic resonance (13C-NMR) spectroscopy and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). From the spectroscopic...

journal_title：Natural product research

authors： Pappas CS,Tarantilis PA,Polissiou MG

更新日期：2003-06-01 00:00:00

abstract：:Phytochemical investigation of the extracts of the leaves of Siparuna thecaphora (Poepp. et Endl.) A. DC. (Siparunaceae) allowed the isolation of one monoterpene glycoside, named trans-thujane-1α,7-diol 1-O-β-D-glucopyranoside (1) along with rutin, quercetin 3-O-β-D-glucopyranoside and 3,4-dihydroxybenzaldehyde. Their...

journal_title：Natural product research

authors： Vera Saltos MB,Naranjo Puente BF,Malafronte N,Braca A

更新日期：2014-01-01 00:00:00

abstract：:Chemical investigation of an ethyl acetate soluble fraction of Sinularia polydactyla (Ehrenberg) led to the isolation of three known terpenoides, two of them sterols, 24-methylcholestane-3β,5α,6β,25-tetrol 25-monoacetate (1), 24-methylcholestane-5-en-3β,25-diol (2), in addition to a cembranoid diterpene, durumolide C ...

journal_title：Natural product research

authors： Aboutabl el-SA,Azzam SM,Michel CG,Selim NM,Hegazy MF,Ali AH,Hussein AA

更新日期：2013-01-01 00:00:00

abstract：:Thirty semicarbazone and thiosemicarbazone derivatives (2a-w and 4a-g) from chalcones containing furan and thiophene ring were designed and synthesized. They were characterized by IR, 1H NMR, 13C NMR and HRMS. The crystal structure of compound 2r was characterized by single crystal X-ray diffraction. It crystallizes i...

journal_title：Natural product research

authors： Cheng W,Xiao T,Qian W,Lu T,Zhang T,Tang X

更新日期：2020-03-16 00:00:00

abstract：:Cynomorium coccineum is a non-photosynthetic plant that grows in Mediterranean countries and that is amply used in the traditional medicine. The aim of this study was to extend previous studies on the chemical and biological properties of C. coccineum, evaluating the potential antiviral and antiproliferative activity ...

journal_title：Natural product research

authors： Vascellari S,Zucca P,Perra D,Serra A,Piras A,Rescigno A

更新日期：2019-10-17 00:00:00

abstract：:A new compound, jolynamine (1), was isolated from the marine brown alga Jolyna laminarioides collected from the coast of Karachi, Pakistan. In addition, four known compounds, namely saringosterol (2), loliolide (3), methyl-4-hydroxybenzoate (4) and propyl-4-hydroxybenzoate (5), were isolated for the first time from th...

journal_title：Natural product research

authors： Khan AM,Noreen S,Imran ZP,Choudhary MI

更新日期：2011-05-01 00:00:00

abstract：:This study is part of a wider investigation aimed to sustain the economical value of the by-products generated by the Citrus industry. In particular, the protected geographic indication (PGI) red orange of sicily (known as blood orange) has been analysed by HPLC and by the enzymatic AOAC method. All the by-products co...

journal_title：Natural product research

authors： Russo M,Bonaccorsi IL,Arigò A,Cacciola F,De Gara L,Dugo P,Mondello L

更新日期：2019-11-29 00:00:00

abstract：:The ethanolic extract of the leaves of Eriobotrya japonica exhibited inhibitory activity against phosphodiesterase-4D (PDE4D), which is a therapeutic target of inflammatory disease. Subsequent bioassay-guided fractionation led to the isolation of a new triterpene (1), together with seven known triterpenoids, methyl co...

journal_title：Natural product research

authors： Tan BX,Yang L,Huang YY,Chen YY,Peng GT,Yu S,Wu YN,Luo HB,He XX

更新日期：2017-12-01 00:00:00

abstract：:In this study, Box-Behnken Design was used to optimize the ultrasonic extraction of polysaccharides from quince peels (QPPs) by ascorbic acid and the effect of extraction temperature, extraction time and pH was evaluated. Under optimized conditions of temperature 90 °C, 60 min sonication time and pH = 3.26, the extrac...

journal_title：Natural product research

authors： Dammak MI,Mzoughi Z,Chakroun I,Mansour HB,Le Cerf D,Majdoub H

更新日期：2020-05-01 00:00:00

abstract：:Fructose feeding induces a rise in blood pressure in normal rats that is associated with insulin resistance, hyperinsulinemia, hyperglycaemia, hypercholesterolaemia and hypertriglyceridaemia. We have examined the effect of chronic administration of A-HRS (100 and 300 mg kg⁻¹; p.o.) isolated from Hibiscus rosa sinensis...

journal_title：Natural product research

authors： Mohan M,Khade B,Shinde A

更新日期：2012-01-01 00:00:00