Discovery of a stable vitamin C glycoside in crab apples (Malus sylvestris).

abstract：:An investigation of an ethyl acetate extract of Embelia schimperi leaves has led to the isolation of 10 oleanane-type triterpenes characterized as 3beta,16alpha-di-O-acetyl-13beta, 28-epoxyoleanane (1), 3beta-acetyl-16-oxo-13beta, 28-epoxyoleanane (2), 3beta-acetyl-16alpha-hydroxy-13beta, 28-epoxyoleanane (3), 3beta-a...

journal_title：Phytochemistry

authors： Manguro LO,Okwiri SO,Lemmen P

更新日期：2006-12-01 00:00:00

abstract：:Acid hydrolysis of cell wall-rich material from thalli of the hornwort Anthoceros caucasicus yielded substantial amounts of an unusual disaccharide (1). Hydrolysis of 1 yielded only GlcA, Gal and unhydrolysed 1. Compound 1 was identified as alpha-D-GlcpA-(1-->3)-L-Gal by 1H and 13C NMR spectroscopic analysis and by th...

journal_title：Phytochemistry

authors： Popper ZA,Sadler IH,Fry SC

更新日期：2003-09-01 00:00:00

abstract：:Myrothecium verrucaria was found to be an effective pathogen against kudzu grown in the greenhouse and the field. M. verrucaria produced large amounts of macrocyclic trichothecenes when cultured on solid rice medium, including epiroridin E (16.8 mg/g crude extract), epiisororidin E (1 mg/g), roridin E (8.7 mg/g), rori...

journal_title：Phytochemistry

authors： Abbas HK,Tak H,Boyette CD,Shier WT,Jarvis BB

更新日期：2001-09-01 00:00:00

abstract：:From the roots of Bupleurum wenchuanense 14 derivatives of saikosaponin were isolated and identified as 2"-O-beta-D-xylopyranosylsaikosaponin b2, 3",6"-O O-diacetylsaikosaponin b2, 2"-O-beta-D-glucopyranosylsaikosaponin b2, saikosaponin b2, 6"-O-acetylsaikosaponin b2, saikosaponin d, 2"-O-acetylsaikosaponin d, 3"-O-ac...

journal_title：Phytochemistry

authors： Luo SQ,Lin LZ,Cordell GA

更新日期：1993-07-01 00:00:00

abstract：:Cinnamyl alcohol dehydrogenase (CAD) (EC 1.1.1.195) from a dicot, Aralia cordata, was purified to homogeneity and its properties were characterized. The enzyme shows a preference for cinnamyl alcohols and cinnamyl aldehydes as substrates. The M(r) is estimated at 72,000. The enzyme is composed of two heterogeneous sub...

journal_title：Phytochemistry

authors： Hibino T,Shibata D,Umezawa T,Higuchi T

更新日期：1993-02-01 00:00:00

abstract：:Eleven previously undescribed flavonoid glycosides, named cleomesides C-M, along with five known compounds, were isolated from the aerial parts of Cleome chelidonii L.f. (Cleomaceae). All flavonol glycosides were esterified derivatives of 3,7-O-diglycosides of quercetin or kaempferol. Their structures were elucidated ...

journal_title：Phytochemistry

authors： Nguyen PD,Sayagh C,Borie N,Lavaud C

更新日期：2017-10-01 00:00:00

abstract：:Proteomic analyses of soybean seedlings responding to flooding were conducted to identify key proteins involved. The seeds were germinated on a spongy matrix for two days, and then subjected to flooding for three days. After flooding, the total number of roots, the length of the main root, the lengths of the lateral a...

journal_title：Phytochemistry

authors： Shi F,Yamamoto R,Shimamura S,Hiraga S,Nakayama N,Nakamura T,Yukawa K,Hachinohe M,Matsumoto H,Komatsu S

更新日期：2008-04-01 00:00:00

abstract：:Cell-wall polysaccharides of bamboo shoots were extracted with chelating reagent (CDTA, trans-1,2-cyclohexanediamine-N,N,N',N'-tetraacetic acid), Na(2)CO(3) and KOH solutions. Glycosyl composition and glycosyl linkage analyses showed that the hemicellulose was composed of arabinoxylan, (1-->3, 1-->4)-beta-D-glucan, xy...

journal_title：Phytochemistry

authors： Edashige Y,Ishii T

更新日期：1998-11-20 00:00:00

abstract：:Five undescribed compounds were separated from Abrus mollis leaves, including two truxillate forms (abrusamide D, H) and three truxinate forms (abrusamide E, F, G). The absolute configuration of abrusamide D was determined by X-ray crystallography. Abrusamide A was reassessed and corrected to be β-truxinate configurat...

journal_title：Phytochemistry

authors： Yuan X,Liu Y,Zhao H,Men L,He C,Qiu Y,Yu Q,Li K,Qi L,Chen D

更新日期：2021-01-01 00:00:00

abstract：:Despite evidence that lignin associates under both aqueous and organic media, the magnitude and nature of the underlying driving forces are still a matter of discussion. The present paper addresses this issue by examining both solution properties and size exclusion behaviour of lignins isolated from five different spe...

journal_title：Phytochemistry

authors： Guerra A,Gaspar AR,Contreras S,Lucia LA,Crestini C,Argyropoulos DS

更新日期：2007-10-01 00:00:00

abstract：:Extracts from the lignifying xylem of Sitka spruce that were enriched in cell-wall-associated glycoproteins contained peroxidase and oxidase activity and readily formed lignin-like water-insoluble dehydrogenation polymers (DHPs) from coniferyl alcohol (CA) when supplied with H2O2. During the formation of DHPs, the abu...

journal_title：Phytochemistry

authors： McDougall GJ

更新日期：2001-05-01 00:00:00

abstract：:The Arabidopsis thaliana genome has over 550 protease sequences representing all five catalytic types: serine, cysteine, aspartic acid, metallo and threonine (MEROPS peptidase database, http://merops.sanger.ac.uk/), which probably reflect a wide variety of as yet unidentified functions performed by plant proteases. Re...

journal_title：Phytochemistry

authors： Beers EP,Jones AM,Dickerman AW

更新日期：2004-01-01 00:00:00

abstract：:Seven pairs of undescribed enantiomeric bis-coumarins, (±)-dievodialetins A-G, were separated from the roots of Evodia lepta Merr. Two coumarin nuclei were linked via a 1,4-dimethyl4-vinylcyclohexene moiety in (±)-dievodialetins C-G. The structures of the undescribed compounds, including their absolute configurations ...

journal_title：Phytochemistry

authors： Huang GY,Cui H,Lu XY,Zhang LD,Ding XY,Wu JJ,Duan LX,Zhang SJ,Liu Z,Zhang RR

更新日期：2021-02-01 00:00:00

abstract：:Biotransformation of 20(S)-protopanaxatriol (1) by the fungus Mucor spinosus AS 3.3450 gave 10 metabolites (2-10), of which 2-5 were previously known. On the basis of NMR and MS analyses, structures 6-10 were established as 12-oxo-23beta-hydroxyl-20(S)-protopanaxatriol (6), 20S,24R-epoxy-dammaran-3beta,6alpha,25-triol...

journal_title：Phytochemistry

authors： Zhang J,Guo H,Tian Y,Liu P,Li N,Zhou J,Guo D

更新日期：2007-10-01 00:00:00

abstract：:The secondary metabolite contents and genetic profiles of six Hypericum species (H. barbatum Jacq., H. hirsutum L., H. linarioides Bosse, H. maculatum Crantz, H. rumeliacum Boiss. and H. tetrapterum Fries), collected from different locations in Serbia, have been analyzed. Methanol extracts of the aerial parts of the p...

journal_title：Phytochemistry

authors： Smelcerovic A,Verma V,Spiteller M,Ahmad SM,Puri SC,Qazi GN

更新日期：2006-01-01 00:00:00

abstract：:Two red Cystofilobasidium spp. isolated from spring sap-flows of Betula pendula were analysed for their carotenoid content. In Cystofilobasidium infirmominiatum, three unusual pigments were detected and identified by structure elucidation as oxidised torulene derivatives. These included 16'-hydroxytorulene and torular...

journal_title：Phytochemistry

authors： Herz S,Weber RW,Anke H,Mucci A,Davoli P

更新日期：2007-10-01 00:00:00

abstract：:Three mature Eucalyptus globulus trees with 40 years of age were studied at three height levels (0%, 35%, and 60% of total tree height) and at three radial regions (sapwood, inner and outer heartwood). The composition of lipophilic extracts was evaluated and an extensive list of 202 compounds was reported for the firs...

journal_title：Phytochemistry

authors： Gominho J,Lourenço A,Marques AV,Pereira H

更新日期：2020-12-01 00:00:00

abstract：:OREB1 is a rice ABRE binding factor characterized by the presence of multiple highly-conserved phosphorylation domains (C1, C2, C3, and C4) and two kinase recognition motifs, RXXS/T and S/TXXE/D, within different functional domains. An in vitro kinase assay showed that OREB1 is phosphorylated not only by the SnRK2 kin...

journal_title：Phytochemistry

authors： Hong JY,Chae MJ,Lee IS,Lee YN,Nam MH,Kim DY,Byun MO,Yoon IS

更新日期：2011-01-01 00:00:00

abstract：:Three saponins, including two dimeric triterpenoid glucosides possessing an unusual skeleton, ivorenosides A and B, and a monomeric triterpenoid saponin (ivorenoside C), together with the known sericoside, were isolated from the bark of Terminalia ivorensis. Their structures were established on the basis of 1D and 2D ...

journal_title：Phytochemistry

authors： Ponou BK,Teponno RB,Ricciutelli M,Quassinti L,Bramucci M,Lupidi G,Barboni L,Tapondjou LA

更新日期：2010-12-01 00:00:00

abstract：:Highly specialized chemical defense pathways are a particularly noteworthy metabolic characteristic of sessile organisms, whether terrestrial or marine, providing protection against pests and diseases. For this reason, knowledge of the metabolites involved in these processes is crucial to producing ecologically fit cr...

journal_title：Phytochemistry

authors： Pedras MS,To QH

更新日期：2015-05-01 00:00:00

abstract：:From the MeOH extract of the leaves of W. japonica, seven phenylpropanoid gentiobiosides (1-7) were isolated along with eight known phenylpropanoids (8-15). Structures of 1-7 were determined based on spectroscopic data and chemical evidence. The activity of compounds 1-15 to scavenge superoxide anion radicals was inve...

journal_title：Phytochemistry

authors： Hosoya T,Yun YS,Kunugi A

更新日期：2008-02-01 00:00:00

abstract：:Plants are attacked by many different herbivores. Some will consume whole leaves or roots, while others will attack specific types of tissue. Thus, insight into the metabolite profiles of different types of leaf tissues is necessary to understand plant resistance against herbivores. Jacobaea vulgaris, J. aquatica and ...

journal_title：Phytochemistry

authors： Nuringtyas TR,Choi YH,Verpoorte R,Klinkhamer PG,Leiss KA

更新日期：2012-06-01 00:00:00

abstract：:A new triterpene and its glycosides were isolated from the bark of Schefflera octophylla together with asiatic acid and asiaticoside. Based on spectroscopic data, especially 2DNMR, and chemical transformations the structures of the new compounds were determined as 3 alpha-hydroxy-urs-12-ene-23,28-dioic acid and 3 alph...

journal_title：Phytochemistry

authors： Sung TV,Lavaud C,Porzel A,Steglich W,Adam G

更新日期：1992-01-01 00:00:00

abstract：:The combination of the hyphenated techniques LC-MS and LC-SPE-NMR constitutes a powerful platform for the rapid isolation and identification of minor components from natural sources. Electronic circular dichroism (ECD) is a useful tool to determine the absolute configuration of small quantities of chiral molecules. In...

journal_title：Phytochemistry

authors： Xu YJ,Foubert K,Dhooghe L,Lemière F,Maregesi S,Coleman CM,Zou Y,Ferreira D,Apers S,Pieters L

更新日期：2012-07-01 00:00:00

abstract：:Three acylated flavonol glycosides have been identified from leaves of Planchonia grandis Ridley. They possess kaempferol as aglycone and two triglycosidic chains substituting hydroxyl groups at the 3- and 7-positions. The first glycosidic unit of each chain is esterified by a cis or trans p-coumaric acid. Structural ...

journal_title：Phytochemistry

authors： Crublet ML,Long C,Sévenet T,Hadi HA,Lavaud C

更新日期：2003-09-01 00:00:00

abstract：:Three fructokinase isozymes (FKI, FKII, FKIII) were separated from both immature and ripe tomato fruit pericarp. All three isozymes were specific for fructose with undetectable activity towards glucose or mannose. The three isozymes could be distinguished from one another with respect to response to fructose, Mg and n...

journal_title：Phytochemistry

authors： Petreikov M,Dai N,Granot D,Schaffer AA

更新日期：2001-11-01 00:00:00

abstract：:To understand raffinose family oligosaccharides (RFO) metabolism in chickpea (Cicer arietinum L.) seeds, RFO accumulation and corresponding biosynthetic enzymes activities were determined during seed development of chickpea genotypes with contrasting RFO concentrations. RFO concentration in mature seeds was found as a...

journal_title：Phytochemistry

authors： Gangola MP,Jaiswal S,Kannan U,Gaur PM,Båga M,Chibbar RN

更新日期：2016-05-01 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

abstract：:The compositions of the essential oils obtained from ten populations of Thymus caespititius grown on S. Jorge (Azores) were studied by GC and GC-MS. All the oils analysed were dominated by their monoterpene fraction (69-9%). The sesquiterpene fraction was rather small (4-17%) and consisted mainly of oxygen-containing ...

journal_title：Phytochemistry

authors： Pereira SI,Santos PA,Barroso JG,Figueiredo AC,Pedro LG,Salgueiro LR,Deans SG,Scheffer JJ

更新日期：2000-10-01 00:00:00

abstract：:From the roots of various Stemona species four new dehydrotocopherols (chromenols) were isolated and their structures and stereochemistry elucidated by spectroscopic methods. The double bond between C-3 and C-4 proved to be a typical chemical character of the genus found in most of the species. Various C-methylations ...

journal_title：Phytochemistry

authors： Brem B,Seger C,Pacher T,Hartl M,Hadacek F,Hofer O,Vajrodaya S,Greger H

更新日期：2004-10-01 00:00:00