32445-75-3

Usage

Chemical compound

Alpha-D-Ribofuranose (9CI)

Upstream product

• 524-69-6 adenine xyloside 
• 42927-46-8 tetra-O-acetyl-D-xylofuranose 
• 20031-21-4 1,2-O-isopropylidene-α-D-xylose 
• 20881-04-3 1,2:3,5-di-O-isopropylidene-D-xylofuranose 
• 2280-44-6 D-Glucose 
• 316-46-1 5-fluorouridine 
• 58-96-8 uridine 
• 128717-93-1 3-O-α-L-rhamnopyranosyl(1->2)-α-L-arabinopyranosyl-oleanolic acid 28-O-β-D-xylopyranosyl(1->6)-β-D-glucopyranosyl ester 
• 128717-92-0 3-O-α-L-rhamnopyranosyl(1->2)-α-L-arabinopyranosyl-hederagenin 28-O-β-D-xylopyranosyl(1->6)-β-D-glucopyranosyl ester 
• 572-30-5 3,3',4',5,7-pentahydroxyflavone 3-O-arabogluocopyranoside 
• 5536-17-4 arabinosyl adenine 
• 3228-71-5 9-(α-D-arabinofuranosyl)adenine 
• 61826-42-4 tetra-O-acetyl-D-arabinofuranose 
• 68768-32-1 3-methylguanosine 

Downstream Products

• 98-01-1 furfural 
• 64-18-6 formic acid 
• 79-14-1 glycolic Acid 
• 849585-22-4 LACTIC ACID 
• 64-19-7 acetic acid 
• 127-17-3 2-oxo-propionic acid 
• 51754-99-5 Methyl 3,5-O-Isopropylidene-β-D-xylofuranoside 
• 7045-40-1 Methyl 3,5-O-Isopropylidene-α-D-xylofuranoside 
• 15384-37-9 D-xylono-1,4-lactone 
• 6022-96-4 5-O-benzoyl-α-D-xylofuranose 
• 142329-54-2 (2R,3R,4R,5R)-2-Allyloxy-5-hydroxymethyl-tetrahydro-furan-3,4-diol 
• 142329-38-2 (2S,3R,4R,5R)-2-Allyloxy-5-hydroxymethyl-tetrahydro-furan-3,4-diol 
• 20031-21-4 1,2-O-isopropylidene-α-D-xylose 
• 20881-04-3 1,2,3,5-di-O-isopropylidene-D-xylofuranose 

Relevant academic research and scientific papers

Isomeric Equilibria of Monosaccharides in Solution. Influence of Solvent and Temperature

The compositions of equilibrium mixtures of D-glucose, D-ribose, β-methyl glucopyranoside and β-methyl ribopyranoside in D2O and dimethyl sulphoxide-d6 have been determined by 1H n.m.r. spectroscopy over the temperature range 0-90 deg C in terms of the coexisting anomers, tautomers and conformers.In glucose solutions only 4C1 pyranose forms could be detected, but the temperature dependence of the α/β ratio differs in the two solvents.Ribose solutions consist of mixtures of six species, the relative concentrations of which display complex temperaturedependences.The experimental results are discussed in terms of solvation contributions to the relative free energies of the different species.

Three new asperentin derivatives from the algicolous fungus aspergillus sp

Three new asperentin-type compounds, 6-O-α-D-ribosylasperentin (1) and 6-O-α- D-ribosyl-8-O-methylasperentin ( 2) and 5-hydroxyl-6-O-methylasperentin (3), along with asperentin (4) and its known analogues (5-9), were isolated from a halotolerant Aspergillus sp. strain F00785, an endotrophic fungus from marine alga. Their structures were determined using extensive NMR and HRESIMS spectroscopic analysis, including the X-ray crystallographic data for the assignment of the absolute configurations of compound 9. Compound 4 exhibited highly potent inhibitory activity against crop pathogens, Colletotrichum gleosporioides Penz. and Colletotrichum gleosporioides (Penz.) Sacc.

α-Glucosidase and Protein Tyrosine Phosphatase 1B Inhibitors from Malbranchea circinata

During a search for new α-glucosidase and protein tyrosine phosphatase 1B inhibitors from fungal sources, eight new secondary metabolites, including two anthranilic acid-derived peptides (1 and 2), four glycosylated anthraquinones (3-6), 4-isoprenylravenelin (7), and a dimer of 5,8-dihydroxy-4-methoxy-α-tetralone (8), along with four known compounds (9-12), were isolated from solid rice-based cultures of Malbranchea circinata. The structural elucidation of these metabolites was performed using 1D and 2D NMR techniques and DFT-calculated chemical shifts. Compounds 1-3, 9, and 10 showed inhibitory activity to yeast α-glucosidase (αGHY), with IC50 values ranging from 57.4 to 261.3 μM (IC50 acarbose = 585.8 μM). The effect of 10 (10.0 mg/kg) was corroborated in vivo using a sucrose tolerance test in normoglucemic mice. The most active compounds against PTP-1B were 8-10, with IC50 values from 10.9 to 15.3 μM (IC50 ursolic acid = 27.8 μM). Docking analysis of the active compounds into the crystal structures of αGHY and PTP-1B predicted that all compounds bind to the catalytic domains of the enzymes. Together, these results showed that M. circinata is a potential source of antidiabetic drug leads.

New triterpenoid saponin from the stems of Albizia adianthifolia (Schumach.) W.Wight

As part of our continuing study of apoptosis-inducing saponins from Cameroonian Albizia genus, one new triterpenoid saponin, named adianthifolioside J (1), together with the known gummiferaoside E (2), were isolated from Albizia adianthifolia stems. The s

Oleanane-type saponins and prosapogenins from Albizia julibrissin and their cytotoxic activities

Two undescribed oleanane-type saponins, julibrosides K–L, along with three undescribed oleanane-type prosapogenins, julibrosides M–O, were isolated from the stem bark of Albizia julibrissin Durazz. and the mild alkaline hydrolysate of the total saponin, r

Synthesis, Radiosynthesis, and in vitro Studies on Novel Hypoxia PET Tracers Incorporating [18F]FDR

We report the synthesis of five radiotracers incorporating different oxyamine spacers between the hypoxia-reactive 2-nitroimidazole moiety and the 5-[18F]-fluorodeoxyribose ([18F]FDR, 12) prosthetic group: three linear alkyl chains w

New dammarane-type triterpenoid saponins from Panax notoginseng leaves and their nitric oxide inhibitory activities

Inflammation is a very common and important pathological process that can cause many diseases. The discovery of anti-inflammatory drugs and the treatment of inflammation are particularly essential. Dammarane-type triterpenoid saponins (PNS) were demonstrated to show anti-inflammatory effects in the leaves of Panax notoginseng. Chromatographies and spectral analysis methods were combined to isolate and identify PNS. Moreover, the nitric oxide (NO) inhibitory activities of all compounds were examined in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. As a result, eleven new dammarane-type triterpenoid saponins, notoginsenosides NL-A1-NL-A4 (1-4), NL-B1-NL-B3 (5-7), NL-C1-NL-C3 (8-10), and NL-D (11) were isolated, and their structures were identified by using various spectrometric techniques and chemical reactions. Among them, compounds 4 and 11 were characterized by the malonyl substitution at 3-position. The 3-malonyl substituted dammarane-type terpennoids were first obtained from natural products. In addition, compounds 1, 2, 5, 6, and 8-10 were found to play an important role in suppressing NO levels at 50 μM, without cytotoxicity. All inhibitory activities were found to be dose-dependent.

Lebbeckoside C, a new triterpenoid saponin from the stem barks of Albizia lebbeck inhibits the growth of human glioblastoma cells

One new acacic acid-type saponin, named lebbeckoside C (1), was isolated from the stem barks of Albizia lebbeck. Its structure was established on the basis of extensive analysis of 1D and 2D NMR (1H, 13C NMR, DEPT, COSY, TOCSY, ROESY, HSQC and HMBC) experiments, HRESIMS studies, and by chemical evidence as 3-O-[β-d-xylopyranosyl-(l→2)-β-d-fucopyranosyl-(1→6)-[β-d-glucopyranosyl(1→2)]-β-d-glucopyranosyl]-21-O-{(2E,6S)-6-O-{4-O-[(2E,6S)-2,6-dimethyl-6-O-(β-d-quinovopyranosyl)octa-2,7-dienoyl]-4-O-[(2E,6S)-2,6-dimethyl-6-O-(β-d-quinovopyranosyl)octa-2,7-dienoyl]-β-d-quinovopyranosyl}-2,6-dimethylocta-2,7-dienoyl}acacic acid 28 O-[β-d-quinovopyranosyl-(l→3)-[α-l-arabinofuranosyl-(l→4)]-α-l-rhamnopyranosyl-(l→2)-β-d-glucopyranosyl] ester. The isolated saponin (1) displayed significant cytotoxic activity against the human glioblastoma cell line U-87 MG and TG1 stem-like glioma cells isolated from a patient tumor with IC50 values of 1.69 and 1.44?μM, respectively.

Anti-allergic inflammatory components from Sanguisorba officinalis L.

Sanguisorba officinalis L. was well known as a traditional herbal medicine to treat inflammation and allergic skin diseases. The aim of this research was to indentify compounds with anti-allergic inflammatory property. Twenty-five compounds (1–25) were isolated from S. officinalis including two new compounds (1 and 8), and their chemical structures were identified by NMR and ESIMS analysis. Consequently, the anti-allergic inflammatory activities of these isolates were investigated by inhibiting β-hexosaminidase and IL-4 production in PMA/A23187-stimulated RBL-2H3 cells. Compounds 6, 8, 13, 17–18 and 25 significantly inhibited β-hexosaminidase release and IL-4 production. Additionally, compounds 8, 17 and 25 effectively suppressed the activation of NF-κB and NF-κB p65 translocation into the nucleus. Anti-inflammatory effects of isolated compounds were evaluated in LPS-stimulated RAW264.7 macrophages, and they showed dramatic inhibition on LPS-induced overproduction of nitric oxide (NO) and TNF-α. Consistently, the protein levels of iNOS and COX-2 were remarkably decreased by the single compounds 8, 13 and 25. These results showed that compounds 8, 13 and 25 from S. officinalis may have a therapeutic potential for allergic inflammatory diseases.

Isolation, purification, characterization and antioxidant activity of polysaccharides from the stem barks of Acanthopanax leucorrhizus

A novel water-soluble polysaccharide (named ALP-1) was successfully isolated from the stem barks of Acanthopanax leucorrhizus by hot-water extraction, and further purified by Cellulose DEAE-52 and Sephadex G-100 chromatography. The structure of ALP-1 was characterized by HPLC, HPGPC, partial acid hydrolysis, periodate oxidation, Smith degradation, methylation, together with UV, IR and NMR spectral analysis. The antioxidant activities also were evaluated in vitro. Structural analysis revealed that ALP-1 was a homogeneous galactan with the average molecular weight of 169 kDa, composed of galactose, glucose, mannose and arabinose in a molar ratio of 6.1:2.1:1.1:1.0, owning a backbone structure of 1,6-linked α-D-Galp residues with some branches of α-D-Manp-(1 → 3)-α-L-Araf residues at O-3 and α-D-Galp residues at O-4 of 1,6-linked α-D-Galp. Antioxidant assay showed that ALP-1 exhibited strong DPPH[rad] and HO[rad] scavenging activities, as well as ferric-reducing antioxidant power. These results provide a scientific basis for the further use of polysaccharides from A. leucorrhizus.