Dihydroagarofuran alkaloid and triterpenes from Maytenus heterophylla and Maytenus arbutifolia.

abstract：:Parasitic diseases continue to be a major worldwide health problem, and there is an urgent need for development of therapeutic drugs. This paper describes synthesis of dehydrodiferulic acid dilactone 1 and dehydrodisinapic acid dilactone 2 furofuran lignans by oxidative coupling of ferulic and sinapic acids, respectiv...

journal_title：Phytochemistry

authors： Pereira AC,Esperandim VR,Ferreira da Silva D,Magalhães LG,Lima TC,Nanayakkara DN,Cunha WR,Bastos JK,Andrade e Silva ML

更新日期：2014-11-01 00:00:00

abstract：:Phytoalexins are inducible chemical defenses produced by plants in response to diverse forms of stress, including microbial attack. Our search for phytoalexins from cruciferous plants resistant to economically important fungal diseases led us to examine stinkweed or pennycress (Thlaspi arvense), a potential source of ...

journal_title：Phytochemistry

authors： Pedras MS,Chumala PB,Suchy M

更新日期：2003-11-01 00:00:00

abstract：:The present study presents comprehensive chemical analyses of cuticular wax mixtures of the bamboo Phyllostachys aurea. The epicuticular and intracuticular waxes were sampled selectively from the adaxial side of leaves on young and old plants and investigated by gas chromatography-mass spectrometry and flame ionizatio...

journal_title：Phytochemistry

authors： Racovita RC,Jetter R

更新日期：2016-10-01 00:00:00

abstract：:Alpha-amylase from germinated mung beans (Vigna radiata) has been purified 600-fold to electrophoretic homogeneity and a final specific activity of 437 U/mg. SDS-PAGE of the final preparation revealed a single protein band of 46 kDa. The optimum pH was 5.6. The energy of activation was determined to be 7.03 kcal/mol i...

journal_title：Phytochemistry

authors： Tripathi P,Lo Leggio L,Mansfeld J,Ulbrich-Hofmann R,Kayastha AM

更新日期：2007-06-01 00:00:00

abstract：:Two sulfur-containing compounds, (S)-2-amino-5-((R)-1-carboxy-2-((E)-3-(4-hydroxy-3-methoxyphenyl)allylthio)ethyl-amino)-5-oxopentanoic acid (1) and (S)-2-amino-5-((R)-1-(carboxymethylamino)-3-((E)-3-(4-hydroxyphenyl)allylthio)-1-oxopropan-2-ylamino)-5-oxopentanoic acid (2), and one 1H-pyrrole-2-carboxylic acid deriva...

journal_title：Phytochemistry

authors： Zheng ZP,Ma J,Cheng KW,Chao J,Zhu Q,Chang RC,Zhao M,Lin ZX,Wang M

更新日期：2010-12-01 00:00:00

abstract：:Changes in specialized metabolites were analyzed in wheat leaves inoculated with Bipolaris sorokiniana, the causal agent of spot blotch of Poaceae species. HPLC analysis detected the accumulation of six compounds in B. sorokiniana-infected leaves. Of these, we purified two compounds by silica gel and ODS column chroma...

journal_title：Phytochemistry

authors： Ube N,Harada D,Katsuyama Y,Osaki-Oka K,Tonooka T,Ueno K,Taketa S,Ishihara A

更新日期：2019-11-01 00:00:00

abstract：:Three alkaloids, neoharringtonine, homoneoharringtonine and 3'S-hydroxyneoharringtonine, were isolated from the leaves and stems of Cephalotaxus harringtonia var. drupacea. Their structures were established by spectroscopic methods, including two-dimensional NMR and CD spectra, and their antileukaemic activity was eva...

journal_title：Phytochemistry

authors： Takano I,Yasuda I,Nishijima M,Yanagi Y,Takeya K,Itokawa H

更新日期：1997-02-01 00:00:00

abstract：:The leaves of Aglaia edulis afforded a new bisamide, aglaiduline, and two new sulfur-containing bisamides, aglaithioduline and aglaidithioduline. Their structures were established from spectroscopic studies. The sulfur-containing amides exhibited slight antiviral activity against herpes simplex virus types 1 and 2. ...

journal_title：Phytochemistry

authors： Saifah E,Suttisri R,Shamsub S,Pengsuparp T,Lipipun V

更新日期：1999-11-01 00:00:00

abstract：:Valerophenone synthase (VPS) is a polyketide synthase that catalyzes the formation of the phloroglucinol derivatives in the synthesis of the bitter acids in hop (Humulus lupulus). The reaction uses isovaleryl-CoA or isobutyryl-CoA, but otherwise it is identical to that of the chalcone synthase in flavonoid biosynthesi...

journal_title：Phytochemistry

authors： Zuurbier KW,Leser J,Berger T,Hofte AJ,Schröder G,Verpoorte R,Schröder J

更新日期：1998-12-01 00:00:00

abstract：:Two bromophenols, together with three known compounds, were isolated from the methanolic extract of the marine alga, Rhodomela confervoides. By means of MS and NMR spectroscopic analyses, they were identified as 3-bromo-4-[2,3-dibromo-4,5-dihydroxyphenyl] methyl-5-(hydroxymethyl) 1,2-benzenediol (1) and 3-bromo-4-[2,3...

journal_title：Phytochemistry

authors： Xu N,Fan X,Yan X,Li X,Niu R,Tseng CK

更新日期：2003-04-01 00:00:00

abstract：:The multitude of terpene carbon skeletons in plants is formed by enzymes known as terpene synthases. This review covers the monoterpene and sesquiterpene synthases presenting an up-to-date list of enzymes reported and evidence for their ability to form multiple products. The reaction mechanisms of these enzyme classes...

journal_title：Phytochemistry

authors： Degenhardt J,Köllner TG,Gershenzon J

更新日期：2009-10-01 00:00:00

abstract：:A new bidesmosidic triterpenoidal saponin of hederagenin was isolated from the ethanolic extract of the roots of Symphytum officinale L. Its structure was elucidated by using 1H NMR, 1H-1H COSY NMR, heteronuclear 1H-13C correlated spectroscopy (heteroCOSY), 13C NMR, DEPT, FAB mass spectrometry and chemical evidence as...

journal_title：Phytochemistry

authors： Noorwala M,Mohammad FV,Ahmad VU,Sener B

更新日期：1994-05-01 00:00:00

abstract：:Three neogrifolin derivatives, 3-hydroxyneogrifolin, 1-formylneogrifolin and 1-formyl-3-hydroxyneogrifolin along with grifolin and neogrifolin were isolated from the Japanese mushroom Albatrellus ovinus belonging to Scutigeraceae. Their structures were established by a combination of two-dimensional NMR spectroscopic ...

journal_title：Phytochemistry

authors： Nukata M,Hashimoto T,Yamamoto I,Iwasaki N,Tanaka M,Asakawa Y

更新日期：2002-04-01 00:00:00

abstract：:A xanthone derivative, named gaboxanthone (1), has been isolated from the seed shells of Symphonia globulifera, together with known compounds, symphonin (2), globuliferin (3), guttiferone A (4), sistosterol, oleanolic acid and methyl citrate. The structure of the compound was assigned as 5,10-dihydroxy-8,9-dimethoxy-2...

journal_title：Phytochemistry

authors： Ngouela S,Lenta BN,Noungoue DT,Ngoupayo J,Boyom FF,Tsamo E,Gut J,Rosenthal PJ,Connolly JD

更新日期：2006-02-01 00:00:00

abstract：:Two phytotoxins were isolated from the liquid culture of Phoma chenopodiicola, a fungal pathogen proposed for the biological control of Chenopodium album, a common worldwide weed of arable crops. The two phytotoxins appeared to be a new tetrasubstituted furopyran and a new ent-pimaradiene. From the same culture a new ...

journal_title：Phytochemistry

authors： Evidente M,Cimmino A,Zonno MC,Masi M,Berestetskyi A,Santoro E,Superchi S,Vurro M,Evidente A

更新日期：2015-09-01 00:00:00

abstract：:The unique series of C-2''-acylated C-glycosylflavones is extended by the discovery of the C-8-glucosyl derivatives 2''-O-galloylvitexin and 2''-O-galloylorientin and their C-6 analogues 2''-O-galloylisovitexin and 2''-O-galloylisoorientin, representing the first described O-galloyl-C-glycosylflavones. They are accomp...

journal_title：Phytochemistry

authors： Latté KP,Ferreira D,Venkatraman MS,Kolodziej H

更新日期：2002-02-01 00:00:00

abstract：:The alkaloids, dechloroacutumidine and 1-epidechloroacutumine, together with three known alkaloids, acutumidine, acutumine, and dechloroacutumine, were isolated from the rhizomes of Menispermum dauricum and their structures established by spectral and chemical methods. The cytotoxicity of each compound against the gro...

journal_title：Phytochemistry

authors： Yu BW,Chen JY,Wang YP,Cheng KF,Li XY,Qin GW

更新日期：2002-10-01 00:00:00

abstract：:From the rootstock of Scabiosa columbria L. loganin and sweroside were isolated. Sweroside showed moderate antibacterial activity. Pure sweroside was converted to the sweroside aglycone 1-acetoxy derivative (DABCO/Ac2O) after hydrolysis of the glucose unit. X-ray crystallography of the monoacetate showed unambiguously...

journal_title：Phytochemistry

authors： Horn MM,Drewes SE,Brown NJ,Munro OQ,Meyer JJ,Mathekga AD

更新日期：2001-05-01 00:00:00

abstract：:Two rare cadinane-type sesquiterpenes, lyophyllone A (1) and lyophyllanetriol A (2), were isolated from the mushroom Lyophyllum transforme. The structures were elucidated on the basis of exhaustive NMR techniques, together with MS, UV-Vis and molecular modelling. The absolute configuration of lyophyllone A was determi...

journal_title：Phytochemistry

authors： Clericuzio M,Negri R,Cossi M,Gilardoni G,Gozzini D,Vidari G

更新日期：2013-09-01 00:00:00

abstract：:A study of the chemistry and antibacterial activity of Scrophularia deserti led to the isolation of eight compounds, including the metabolite 3(zeta)-hydroxy-octadeca-4(E),6(Z)-dienoic acid (1). The known compounds ajugoside (2), scropolioside B (3), 6-O-alpha-L-rhamnopyranosylcatalpol (4), buddlejoside A(8) (5), scro...

journal_title：Phytochemistry

authors： Stavri M,Mathew KT,Gibbons S

更新日期：2006-07-01 00:00:00

abstract：:Abscisic acid (ABA) has been implicated as a mediator in plant responses to various environmental stresses. To evaluate the transcriptional and metabolic events downstream of ABA perception, Arabidopsis thaliana seedlings were analyzed by transcript and metabolite profiling, and results were integrated, using the rece...

journal_title：Phytochemistry

authors： Ghassemian M,Lutes J,Chang HS,Lange I,Chen W,Zhu T,Wang X,Lange BM

更新日期：2008-12-01 00:00:00

abstract：:During the past two decades the study of the Myristicaceae species has increased, and many flavonoids of different types have been isolated. This review discusses the flavonoids presently known in the Myristicaceae. ...

journal_title：Phytochemistry

authors： Valderrama JC

更新日期：2000-11-01 00:00:00

abstract：:Chemical investigation of the traditional Chinese medicine, Murraya kwangsiensis, led to the isolation of 16 undescribed biscarbazole alkaloids, kwangsines A-M, two undescribed natural products, (+/-)-bispyrayafoline C, and 19 known monomeric analogues. (±)-Bispyrayafoline C and (±)-kwangsines A-C are four pairs of bi...

journal_title：Phytochemistry

authors： Chen Y,Cao N,Lv H,Zeng K,Yuan J,Guo X,Zhao M,Tu P,Jiang Y

更新日期：2020-02-01 00:00:00

abstract：:Benzoxazinoids are secondary metabolites that are effective in defence and allelopathy. They are synthesised in two subfamilies of the Poaceae and sporadically found in single species of the dicots. The biosynthesis is fully elucidated in maize; here the genes encoding the enzymes of the pathway are in physical proxim...

journal_title：Phytochemistry

authors： Frey M,Schullehner K,Dick R,Fiesselmann A,Gierl A

更新日期：2009-10-01 00:00:00

abstract：:Twenty phenolic compounds, representatives of proanthocyanidins and gallic acid/hexahydroxyldiphenic acid esters of glucose, have been assessed for their ability to inhibit binding of specific radioligands to 16 receptors. The receptors utilized were alpha 1-, alpha 2- and beta-adrenoceptors, adenosine 1, dopamine 1 a...

journal_title：Phytochemistry

authors： Zhu M,Phillipson JD,Greengrass PM,Bowery NE,Cai Y

更新日期：1997-02-01 00:00:00

abstract：:Metabolomics or the large-scale phytochemical analysis of plants is reviewed in relation to functional genomics and systems biology. A historical account of the introduction and evolution of metabolite profiling into today's modern comprehensive metabolomics approach is provided. Many of the technologies used in metab...

journal_title：Phytochemistry

authors： Sumner LW,Mendes P,Dixon RA

更新日期：2003-03-01 00:00:00

abstract：:A combination of high-resolution mass spectrometry and modern HPLC column technology, assisted by diode array detection, was used for accurate characterization of water-soluble polyphenolic compounds in the pistils, stamens, petals, sepals, stems, leaves, roots and seeds of Geranium sylvaticum. The organs contained a ...

journal_title：Phytochemistry

authors： Tuominen A,Toivonen E,Mutikainen P,Salminen JP

更新日期：2013-11-01 00:00:00

abstract：:Ganoderma lingzhi is a valuable, edible and medicinal fungus that has been widely used for the prevention and treatment of a broad range of diseases. In this study, spirolingzhines A-D, four meroterpenoids with a spiro[benzofuran-2,10-cyclopentane] motif, lingzhines A-F, six meroterpenoids with diverse ring systems, a...

journal_title：Phytochemistry

authors： Yan YM,Wang XL,Luo Q,Jiang LP,Yang CP,Hou B,Zuo ZL,Chen YB,Cheng YX

更新日期：2015-06-01 00:00:00

abstract：:In its natural environment, the plant cuticle, which is composed of the biopolymer cutin and a mixture of surface and embedded cuticular waxes, experiences a wide variety of temperatures and hydration states. Consequently, a complete understanding of cuticular function requires study of its thermal and mechanical prop...

journal_title：Phytochemistry

authors： Stark RE,Yan B,Stanley-Fernandez SM,Chen ZJ,Garbow JR

更新日期：2008-11-01 00:00:00

abstract：:A study of wheat (Triticum aestivum L.) leaves phenolome was carried out during cold acclimation of the winter (Claire) and spring (Bounty) varieties using a combination of HPLC-ESI-MS techniques. A total of 40 phenolic and flavonoid compounds were identified, and consisted mainly of two coumarin derivatives, eight si...

journal_title：Phytochemistry

authors： Moheb A,Ibrahim RK,Roy R,Sarhan F

更新日期：2011-12-01 00:00:00