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Monomelioside

$870

  • Brand : BIOFRON

  • Catalogue Number : AV-H04078

  • Specification : 98%

  • CAS number : 20633-72-1

  • Formula : C15H22O10

  • Molecular Weight : 362.34

  • PUBCHEM ID : 11968396

  • Volume : 20mg

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Catalogue Number

AV-H04078

Analysis Method

HPLC,NMR,MS

Specification

98%

Storage

2-8°C

Molecular Weight

362.34

Appearance

White crystalline powder

Botanical Source

Rehmannia glutinosa Libosch.

Structure Type

Category

Standards;Natural Pytochemical;API

SMILES

C1=COC(C2C1(C(C=C2CO)O)O)OC3C(C(C(C(O3)CO)O)O)O

Synonyms

[1S-(1alpha,4aalpha,5alpha,7aalpha)]-1,4a,5,7a-Tetrahydro-4a,5-dihydroxy-7-(hydroxymethyl)cyclopenta[c]pyran-1-yl beta-D-glucopyranoside/β-D-Glucopyranoside, (1S,4aS,5R,7aR)-1,4a,5,7a-tetrahydro-4a,5-dihydroxy-7-(hydroxymethyl)cyclopenta[c]pyran-1-yl/Monomelittoside/(1S,4aS,5R,7aR)-4a,5-Dihydroxy-7-(hydroxymethyl)-1,4a,5,7a-tetrahydrocyclopenta[c]pyran-1-yl β-D-glucopyranoside

IUPAC Name

(2S,3R,4S,5S,6R)-2-[[(1S,4aS,5R,7aR)-4a,5-dihydroxy-7-(hydroxymethyl)-5,7a-dihydro-1H-cyclopenta[c]pyran-1-yl]oxy]-6-(hydroxymethyl)oxane-3,4,5-triol

Density

1.7±0.1 g/cm3

Solubility

Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc.

Flash Point

373.1±31.5 °C

Boiling Point

693.3±55.0 °C at 760 mmHg

Melting Point

InChl

InChI=1S/C15H22O10/c16-4-6-3-8(18)15(22)1-2-23-13(9(6)15)25-14-12(21)11(20)10(19)7(5-17)24-14/h1-3,7-14,16-22H,4-5H2/t7-,8-,9+,10-,11+,12-,13+,14+,15-/m1/s1

InChl Key

WVHRUHMGDQLMBZ-KRWIWSHESA-N

WGK Germany

RID/ADR

HS Code Reference

Personal Projective Equipment

Correct Usage

For Reference Standard and R&D, Not for Human Use Directly.

Meta Tag

provides coniferyl ferulate(CAS#:20633-72-1) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. Articles of coniferyl ferulate are included as well.>> amp version: coniferyl ferulate

No Technical Documents Available For This Product.

PMID

24852786

Abstract

Objective
To evaluate the performance of Finnish Diabetes Risk Score (FINDRISC) in detecting undiagnosed diabetes and prediabetes among U.S. adults by gender and race.

Methods
This cross-sectional analysis included participants (aged ≥20 years) from the National Health and Nutrition Examination Survey (NHANES) 1999-2010. Sensitivity, specificity, area under the receiver operating characteristic (ROC) curve and the optimal cutoff points for identifying undiagnosed diabetes and prediabetes were calculated for FINDRISC by gender and race/ethnicity.

Results
Among the 20,633 adults (≥20 years), 49.8% were women and 53.0% were non-Hispanic White. The prevalence of undiagnosed diabetes and prediabetes was 4.1% and 35.6%, respectively. FINDRISC was positively associated with the prevalence of diabetes (OR?=?1.48 for 1 unit increase, p<0.001) and prediabetes (OR?=?1.15 for 1 unit increase, p<0.001). The area under ROC for detecting undiagnosed diabetes was 0.75 for total population, 0.74 for men and 0.78 for women (p?=?0.04); 0.76 for White, 0.76 for Black and 0.72 for Hispanics (p?=?0.03 for White vs. Hispanics). The area under ROC for detecting prediabetes was 0.67 for total population, 0.66 for men and 0.70 for women (p<0.001); 0.68 for White, 0.67 for Black and 0.65 for Hispanics (p<0.001 for White vs. Hispanics). The optimal cutoff point was 10 (sensitivity?=?0.75) for men and 12 (sensitivity?=?0.72) for women for detecting undiagnosed diabetes; 9 (sensitivity?=?0.61) for men and 10 (sensitivity?=?0.69) for women for detecting prediabetes. Conclusions FINDRISC is a simple and non-invasive screening tool to identify individuals at high risk for diabetes in the U.S. adults.

Title

Evaluation of Finnish Diabetes Risk Score in Screening Undiagnosed Diabetes and Prediabetes among U.S. Adults by Gender and Race: NHANES 1999-2010

Author

Lu Zhang, 1 Zhenzhen Zhang, 2 Yurong Zhang, 3 Gang Hu, 4 and Liwei Chen 5 , *

Publish date

2014 May 22

PMID

29776925

Abstract

Lactobacillus plantarum is the lactic acid bacterial species most frequently found in plant-food fermentations where hydroxycinnamic acids are abundant. L. plantarum efficiently decarboxylates these compounds and also reduces them, yielding substituted phenylpropionic acids. Although the reduction step is known to be induced by a hydroxycinnamic acid, the enzymatic machinery responsible for this reduction pathway has not been yet identified and characterized. A previous study on the transcriptomic response of L. plantarum to p-coumaric acid revealed a marked induction of two contiguous genes, lp_1424 and lp_1425, encoding putative reductases. In this work, the disruption of these genes abolished the hydroxycinnamate reductase activity of L. plantarum, supporting their involvement in such chemical activity. Functional in vitro studies revealed that Lp_1425 (HcrB) exhibits hydroxycinnamate reductase activity but was unstable in solution. In contrast, Lp_1424 (HcrA) was inactive but showed high stability. When the hcrAB genes were co-overexpressed, the formation of an active heterodimer (HcrAB) was observed. Since L. plantarum reductase activity was only observed on hydroxycinnamic acids (o-coumaric, m-coumaric, p-coumaric, caffeic, ferulic, and sinapic acids), the presence of a hydroxyl group substituent on the benzene ring appears to be required for activity. In addition, hydroxycinnamate reductase activity was not widely present among lactic acid bacteria, and it was associated with the presence of hcrAB genes. This study revealed that L. plantarum hydroxycinnamate reductase is a heterodimeric NADH-dependent coumarate reductase acting on a carbon-carbon double bond.

IMPORTANCE Lactobacillus plantarum is a bacterial species frequently found in the fermentation of vegetables where hydroxycinnamic acids are present. The bacterial metabolism on these compounds during fermentation plays a fundamental role in the biological activity of hydroxycinnamates. L. plantarum strains exhibit an as yet unknown reducing activity, transforming hydroxycinnamates to substituted phenylpropionic acids, which possess higher antioxidant activity than their precursors. The protein machinery involved in hydroxycinnamate reduction, HcrAB, was genetically identified and characterized. The heterodimeric NADH-dependent coumarate reductase HcrAB described in this work provides new insights on the L. plantarum metabolic response to counteract the stressful conditions generated by food phenolics.

KEYWORDS

lactic acid bacteria, hydroxycinnamates, phenolic compounds, reductases, vegetable foods

Title

Unravelling the Reduction Pathway as an Alternative Metabolic Route to Hydroxycinnamate Decarboxylation in Lactobacillus plantarum

Author

Laura Santamaria,a Ines Reveron,a Felix Lopez de Felipe,a Blanca de las Rivas,a and Rosario MuNozcorresponding authora

Publish date

2018 May 18

PMID

29934329

Abstract

Ethylphenols are strong odorants produced by microbial activity that are described as off flavors in several foods. Lactobacillus plantarum is a lactic acid bacterial species able to produce ethylphenols by the reduction of vinylphenols during the metabolism of hydroxycinnamic acids. However, the reductase involved has not been yet uncovered. In this study, the involvement in vinylphenol reduction of a gene encoding a putative reductase (lp_3125) was confirmed by the absence of reduction activity in the Δlp_3125 knockout mutant. The protein encoded by lp_3125, VprA, was recombinantly produced in Escherichia coli. VprA was assayed against vinylphenols (4-vinylphenol, 4-vinylcatechol, and 4-vinylguaiacol), and all were reduced to their corresponding ethylphenols (4-ethylphenol, 4-ethylcatechol, and 4-ethylguaiacol). PCR and high-performance liquid chromatography (HPLC) detection methods revealed that the VprA reductase is not widely distributed among the lactic acid bacteria studied and that only the bacteria possessing the vprA gene were able to produce ethylphenol from vinylphenol. However, all the species belonging to the L. plantarum group were ethylphenol producers. The identification of the L. plantarum VprA protein involved in hydroxycinnamate degradation completes the route of degradation of these compounds in lactic acid bacteria.

IMPORTANCE The presence of volatile phenols is considered a major organoleptic defect of several fermented alcoholic beverages. The biosynthesis of these compounds has been mainly associated with Brettanomyces/Dekkera yeasts. However, the potential importance of lactic acid bacteria in volatile phenol spoilage is emphasized by reports describing a faster ethylphenol production by these bacteria than by yeasts. The genetic identification of the bacterial vinylphenol reductase involved in volatile phenol production provides new insights into the role of lactic acid bacteria in the production of these off flavors. The development of a molecular method for the detection of ethylphenol-producing bacteria could be helpful to design strategies to reduce the bacterial production of vinylphenols in fermented foods.

KEYWORDS

aroma, cider, ethylguaiacol, ethylphenol, lactic acid bacteria, off flavors, phenolic compounds, spoilage, volatile phenols, wine

Title

Ethylphenol Formation by Lactobacillus plantarum: Identification of the Enzyme Involved in the Reduction of Vinylphenols

Author

Laura Santamaria,a Ines Reveron,a Felix Lopez de Felipe,a Blanca de las Rivas,a and Rosario MuNozcorresponding authora

Publish date

2018 Jun 22


Description :

Monomelittoside is a natural compound.