488-28-8

Upstream product

• 3615-37-0 D-Fucose 
• 3615-41-6 L-Rhamnose 
• 7732-18-5 water 
• 20031-16-7 L-Rhamnono-1,4-lactone 
• 69992-12-7 (3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyl-3H-4,5,6-trihydropyran-2-one 
• 20246-37-1 L-rhamnonic acid 
• 488-28-8 hexane-1,2,3,4,5-pentaol 
• 13074-06-1 L-fucitol 
• 2438-80-4 L-Fucose 
• 6014-42-2 L-rhamnose 

Downstream Products

• 488-28-8 racemic rhodeitol 
• 86296-06-2 1-O-trityl-L-rhamnitol 
• 13039-56-0 5-deoxy-L-arabinose 
• 57-55-6 propylene glycol 
• 34557-54-5 methane 
• 67-63-0 isopropyl alcohol 
• 513-85-9 2.3-butanediol 
• 14807-05-7 6-deoxy-L-arabino-2-hexulose 
• 7464-37-1 O²,O⁵-methanediyl-O²,O³-bis-(toluene-4-sulfonyl)-1,6-dideoxy-L-mannitol 
• 55645-91-5 O³-benzoyl-O²,O⁵;O⁴,O⁶-dimethanediyl-1-deoxy-L-mannitol 
• 5349-06-4 O²,O⁵;O⁴,O⁶-dimethanediyl-O³-methyl-1-deoxy-DL-mannitol 
• 5349-06-4 O²,O⁵;O⁴,O⁶-dimethanediyl-O³-methyl-1-deoxy-L-mannitol 
• 5399-33-7 O²,O⁵-methanediyl-1-deoxy-DL-mannitol 
• 5399-33-7 O²,O⁵-methanediyl-1-deoxy-L-mannitol 

Relevant academic research and scientific papers

Seven undescribed steroids from the leaves of Datura metel L.

Extraction of Datura metel L. leaves with ethanol as a solvent gave a group of steroids, including two unique 1,10-seco-withanolides (1, 4), an unusual nitrogen-containing withanolides (2), one undescribed saponin (3), two withanolides with a carbohydrate (5, 6), and one C21 steroid (7). These compounds' structures were identified based on HR-ESI-MS and 1H, 13C NMR data analyses, also compared with data from the document. Some compounds showed moderate inhibition on NO production in lipopolysaccharide-stimulated RAW 264.7 cells.

Effect of carbon chain length on catalytic C–O bond cleavage of polyols over Rh-ReOx/ZrO2 in aqueous phase

Production of linear deoxygenated C4 (butanetriols, -diols, and butanols), C5 (pentanetetraols, -triols, -diols, and pentanols), and C6 products (hexanepentaols, -tetraols, -triols, -diols, and hexanols) is achievable by hydrogenolysis of erythritol, xylitol, and sorbitol over supported-bimetallic Rh-ReOx (Re/Rh molar ratio 0.5) catalyst, respectively. After validation of the analytical methodology, the effect of some reaction parameters was studied. In addition to C–O bond cleavage by hydrogenolysis, these polyols can undergo parallel reactions such as epimerization, cyclic dehydration, and C–C bond cleavage. The time courses of each family of linear deoxygenated C4, C5, and C6 products confirmed that the sequence of appearance of the different categories of deoxygenated products followed a multiple sequential deoxygenation pathway. The highest selectivity to a mixture of linear deoxygenated C4, C5, and C6 products at 80percent conversion was favoured under high pressure in the presence of 3.7wt.percentRh-3.5wt.percentReOx/ZrO2 catalysts (54–71percent under 80 bar) at 200 °C.

Water-soluble polysaccharides from finger citron fruits (Citrus medica L. var. sarcodactylis)

Four water-soluble polysaccharides, FCp-1, FCp-2, FCp-3, and FCp-4 were obtained from finger citron fruits (Citrus medica L. var. sarcodactylis) by hot-water extraction and ethanol precipitation, followed by routine separation procedure. Based on the calibration curve, molecular weights of them were estimated to be 113.9, 32.6, 140.3, and 177.1 kDa respectively. The acid hydrolysis, methylation, IR, GC-MS, and NMR experiments were used for composition analysis. FCp-1 was a heteropolysaccharide composed of arabinose, galactose, glucose, rhamnose, and xylose, with a molar ratio of 3.0:7.0:4.1:1.0:1.5. FCp-2 and FCp-4 were →4)-α-d-GalpA(1→ linking galacturonan differ in molecular weights. FCp-3 was a →6)-α-d-Glcp(1→ linking glucan. According to the results of in vitro assays, FCp-3 showed significantly and moderately enhancing capacities toward the proliferation of splenocytes and thymocytes respectively. Thus, FCp-3 or analogs may have further use as immunomodulatory agents.

Smith degradation of the O-antigenic polysaccharide of Salmonella Dakar: structural studies of the products

Two different oligosaccharides were obtained from the Smith degradation of the O-polysaccharide isolated from the lipopolysaccharide of Salmonella Dakar. The structures of these oligosaccharides were investigated by chemical analysis, NMR spectroscopy and MALDI-TOF mass spectrometry. The following structures of these products were determined: α-d-GalpNAc-(1→4)-α-d-Quip3NAc-(1→3)-α-l-Rha p-(1→2)-threitol and {A figure is presented}. where Quip3NAc is 3-acetamido-3,6-dideoxyglucose. The reaction products confirmed the structure of the repeating unit of the Salmonella Dakar O-polysaccharide reported previously [Kumirska, J.; Szafranek, J.; Czerwicka, M.; Paszkiewicz, M.; Dziadziuszko, H.; Kunikowska, D.; Stepnowski, P. Carbohydr. Res. 2007, 342, 2138-2143].