Results 91 to 100 of about 18,265 (273)

Crystal structure of β-d,l-allose

Acta Crystallographica Section E: Crystallographic Communications, 2015
The title compound, C6H12O6, a C-3 position epimer of glucose, was crystallized from an equimolar mixture of d- and l-allose. It was confirmed that d-allose (l-allose) formed β-pyranose with a 4C1 (1C4) conformation in the crystal.
Tomohiko Ishii, Tatsuya Senoo, Taro Kozakai, Kazuhiro Fukada, Genta Sakane   +4 more
doaj   +1 more source

First Total Synthesis of Varioxiranol A

Molecules, 2019
The paper describes the first total synthesis of natural varioxiranol A by chiral pool approach and confirmation of its absolute configuration by single-crystal X-ray analysis.
Angelika Lásiková, Jana Doháňošová, Mária Štiblariková, Martin Parák, Ján Moncol, Tibor Gracza   +5 more
doaj   +1 more source

Preparative Synthesis of dTDP-L-Rhamnose Through Combined Enzymatic Pathways

, 2005
dTDP-L-rhamnose, an important precursor of O-antigen, was prepared on a large scale from dTMP by executing an one-pot reaction in which six enzymes are involved. Two enzymes, dTDP-4-keto-6-deoxy-D-glucose 3,5-epimerase and dTDP-4-keto-rhamnose reductase,
Kang, Young Bok Abraham, Kim, Byung-Gee, Lee, Hei Chan, Lee, Kwang-Won, Lee, Sun-Gu, Liou, Kwangkyoung, Sohng, Jae Kyung, Yang, Yung-Hun   +7 more
core  

Phage-encoded enzymes found in Acinetobacter baumannii convert pseudaminic acid to 8-epipseudaminic acid

Communications Biology
The nonulosonic acid 8-epipseudaminic acid was discovered only recently in two Acinetobacter baumannii strains but the genes responsible for conversion of pseudaminic acid to its 8-epimer were not found at the K locus.
Nowshin S. Sharar, Andrea Iovine, Cristina De Castro, Ruth M. Hall, Johanna J. Kenyon   +4 more
doaj   +1 more source

β-d-Gulose

Acta Crystallographica Section E, 2014
The title compound, C6H12O6, a C-3 position epimer of d-galactose, crystallized from an aqueous solution, was confirmed as β-d-pyranose with a 4C1 (C1) conformation.
Tomohiko Ishii, Shunsuke Ohga, Kazuhiro Fukada, Kenji Morimoto, Genta Sakane   +4 more
doaj   +1 more source

Genomics-inspired discovery of massiliachelin, an agrochelin epimer from Massilia sp. NR 4-1

Beilstein Journal of Organic Chemistry, 2019
A putative siderophore locus was detected in the genome of the violacein-producing bacterium Massilia sp. NR 4-1 and predicted to direct the biosynthesis of a molecule that is structurally related to the thiazoline-containing siderophore micacocidin.
Jan Diettrich, Hirokazu Kage, Markus Nett   +2 more
doaj   +1 more source

Sphingolipid bases. A revisitation of the O-methyl derivatives of sphingosine. Isolation and characterization of diacetate derivatives, with revised 13C nuclear magnetic resonance assignments for D-erythro-sphingosine.

Journal of Lipid Research, 1995
As described by Carter et al. (J. Biol. Chem. 1951. 192: 197-207), O-methyl derivatives of sphingosine are formed upon acid hydrolysis of sphingolipids in the presence of methanol.
A Kisic, M Tsuda, R J Kulmacz, W K Wilson, G J Schroepfer, Jr   +4 more
doaj   +1 more source

Total synthesis, structural, and biological evaluation of stylissatin A and related analogs [PDF]

, 2016
The natural product cyclic peptide stylissatin A (1a) was reported to inhibit nitric oxide production in LPS-stimulated murine macrophage RAW 264.7 cells.
Afridi, Akindele, Ali, Bizzaro, Bourel-Bonnet, Cantrell, Ganesan, Heidler, Jadhav, Kita, Kumarn, Li, Manger, Marques, Marta, Mesaik, Nagori, O'Donnell, Qin, Shaheen, Shaheen, Siemion, Tabudravu, Tabudravu, Thieriet, Valko, Waldmann, Wang, White, Yang, Zhang   +30 more
core   +1 more source

Forward-predictive SERS-based chemical taxonomy for untargeted structural elucidation of epimeric cerebrosides

Nature Communications
Achieving untargeted chemical identification, isomeric differentiation, and quantification is critical to most scientific and technological problems but remains challenging. Here, we demonstrate an integrated SERS-based chemical taxonomy machine learning
Emily Xi Tan, Shi Xuan Leong, Wei An Liew, In Yee Phang, Jie Ying Ng, Nguan Soon Tan, Yie Hou Lee, Xing Yi Ling   +7 more
doaj   +1 more source

Alkaloids from Hippeastrum papilio

Molecules, 2011
Galanthamine, an acetylcholinesterase inhibitor marketed as a hydrobromide salt (Razadyne®, Reminyl®) for the treatment of Alzheimer’s disease (AD), is obtained from Amaryllidaceae plants, especially those belonging to the genera Leucojum, Narcissus ...
Jaume Bastida, Jean Paulo de Andrade, José Angelo S. Zuanazzi, Carles Codina, Francesc Viladomat, Strahil Berkov   +5 more
doaj   +1 more source