Results 61 to 70 of about 8,953 (240)

Integrated Analysis of the Bark Oil from by GC(RI), GC-MS and NMR. C NMR data of Cyclocopacamphene and Cyclosativene

Natural Product Communications, 2017
The composition of leaf and bark oils of Cinnamosma madagascariensis has been investigated by a combination of GC (RI), GC-MS and 13 C NMR. The leaf oil contained mainly monoterpenes: myrcene (17.9%), limonene (17.8%), β-phellandrene (15.3%) and linalool
Gabriel Garcia, Delphin Rabehaja, Julie-Marie Charmillon, Panja Ramanoelina, Joseph Casanova, Félix Tomi   +5 more
doaj   +1 more source

General Intermediates for the Synthesis of 6-C-Alkylated DMDP-Related Natural Products

Molecules, 2013
Protected L-homoDMDP en-8 and its C-6 epimer en-7 were prepared through two different pathways starting from the vinylpyrrolidine en-9. Based on the NMR and X-ray analysis, the stereochemistry of homoDMDP at C-6 was confirmed to be consistent with ...
Chu-Yi Yu, Yue-Mei Jia, Yi-Xian Li, Mu-Hua Huang   +3 more
doaj   +1 more source

Formation of Bicyclic Skeletons by Aerobic, Manganese‐Mediated Cyclization of β‐Oxoesters

European Journal of Organic Chemistry, Volume 29, Issue 30, 12 August 2026.
Manganese(III) promotes aerobic radical cyclization reactions of β‐oxoesters with an ω‐alkenyl side chain at the β’‐position to give bicyclic products with a 1,4‐dicarbonyl structure. Bicyclic perhydro‐pentalene, ‐indene, and ‐azulene, as well as decaline skeletons were accessed by aerobic manganese(III)‐mediated radical cyclizations of cyclic β ...
Julian Friedrich, Marc Schmidtmann, Jens Christoffers   +2 more
wiley   +1 more source

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

21,28-Epoxy-18β,21β-Dihydroxbaccharan-3-one and Other Terpenoids from the Liverwort T. Taylor

Natural Product Communications, 2008
A new triterpenoid, 21,28-epoxy-18β,21β-dihydroxybaccharan-3-one (1), with a spiro-hemiketal side-chain, has been isolated from the liverwort Lepidozia chordulifera.
Hildegard Zapp, Kerstin Orth, Josef Zapp, Joseph D. Connolly, Hans Becker   +4 more
doaj   +1 more source

In Vitro Metabolism of Δ8‐, Δ9‐, and Δ10‐THC in Human Hepatocytes: Distinct Δ10‐THC Biotransformation and Implications for Drug Testing

Drug Testing and Analysis, Volume 18, Issue 8, Page 1114-1121, August 2026.
Δ8‐THC and Δ9‐THC showed comparable metabolic profiles. In contrast, Δ10‐THC underwent extensive glucuronidation and hydroxylation, with only minor formation of a carboxy metabolite, indicating a markedly different metabolic pathway. These differences may increase the risk of misidentification and misinterpretation in cannabis drug testing.
Robert Kronstrand, Henrik Green, Markus Loh, Fabian Rüttimann, Manuela Carla Monti   +4 more
wiley   +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

The Role of Immunoresolvents in Atherosclerosis: A Mini‐Review on Their Biology and Therapeutic Opportunities

Health Science Reports, Volume 9, Issue 8, August 2026.
ABSTRACT Background and Aims Atherosclerosis is a lipid‐induced chronic inflammatory cardiovascular disorder denoted by the infiltration of immune cells and the agglomeration of lipids in the intima, the innermost layer, of the arteries of large and medium sizes.
Ramin Lotfi, Alireza Nasirifar, Hoda Rahmani, Sara Falahi, Meysam Kashiri   +4 more
wiley   +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

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