نتایج جستجو برای: β d

تعداد نتایج: 741568  

Journal: :Australasian J. Combinatorics 2003
Neil P. Carnes Anne Dye James F. Reed

A transitive triple, (a, b, c), is defined to be the set {(a, b), (b, c), (a, c)} of ordered pairs. A directed triple system of order v, DTS(v), is a pair (D, β), where D is a set of v points and β is a collection of transitive triples of pairwise distinct points of D such that any ordered pair of distinct points of D is contained in precisely one transitive triple of β. An antiautomorphism of ...

2007
B. PRIBULOVÁ

As shown especially for the transformation of the thermally rather unstable α-D-galactofuranosylnitromethane to α-D-galactofuranosylmethylamine, the electron-transfer reduction of glycosylnitromethanes with ferrous ions in aqueous ammonia at room temperature is a very mild and convenient alternative of the preparation of the corresponding glycosylmethylamines. Also βL-rhamnopyranosylmethylamine...

2018
Imanol Usabiaga Ander Camiruaga Aran Insausti Pierre Çarçabal Emilio J. Cocinero Iker León José A. Fernández

Citation: Usabiaga I, Camiruaga A, Insausti A, Çarçabal P, Cocinero EJ, León I and Fernández JA (2018) Phenyl-β-D-glucopyranoside and Phenyl-β-D-galactopyranoside Dimers: Small Structural Differences but Very Different Interactions. Front. Phys. 6:3. doi: 10.3389/fphy.2018.00003 Phenyl-β-D-glucopyranoside and Phenyl-β-D-galactopyranoside Dimers: Small Structural Differences but Very Different I...

Journal: :Molecules 2016
Jian-Fa Zong Yun-Ru Peng Guan-Hu Bao Ru-Yan Hou Xiao-Chun Wan

Two new oleanane-type saponins, named oleiferasaponins C₄ (1) and C₅ (2), were isolated from Camellia oleifera Abel. seed cake residue. Their respective structures were identified as 16α-hydroxy-22α-O-angeloyl-23α-aldehyde-28-dihydroxymethylene-olean-12-ene-3β-O-[β-d-galacto-pyranosyl-(1→2)]-[β-d-glucopyranosyl-(1→2)-β-d-galactopyranosy-(1→3)]-β-d-glucopyranosid-uronic acid methyl ester (1) and...

Journal: :Molecules 2011
Venkata Sai Prakash Chaturvedula Mani Upreti Indra Prakash

Three novel diterpene glycosides were isolated for the first time from the commercial extract of the leaves of Stevia rebaudiana, along with several known steviol glycosides, namely stevioside, rebaudiosides A-F, rubusoside and dulcoside A. The new compounds were identified as 13-[(2-O-β-D-glucopyranosyl-3-O-β-D-glucopyranosyl-β-D-glucopyranosyl)oxy] ent-kaur-15-en-19-oic acid, 13-[(2-O-β-D-glu...

Journal: :Molecules 2018
Sándor Kun Éva Bokor Ádám Sipos Tibor Docsa László Somsák

The aim of the present study was to broaden the structure-activity relationships of C- and N-β-d-glucopyranosyl azole type inhibitors of glycogen phosphorylase. 1-Aryl-4-β-d-gluco-pyranosyl-1,2,3-triazoles were prepared by copper catalyzed azide-alkyne cycloadditions between O-perbenzylated or O-peracetylated β-d-glucopyranosyl ethynes and aryl azides. 1-β-d-Gluco-pyranosyl-4-phenyl imidazole w...

Journal: :Molecules 2010
Juliana C Holzbach Lucia M X Lopes

A new aristolactam, aristolactam 9-O-β-D-glucopyranosyl-(1→2)-β-D-glucoside, and two alkamides, N-cis- and N-trans-p-coumaroyl-3-O-methyldopamine, were isolated from stems of Aristolochia gigantea, together with the known compounds allantoin, E-nerolidol, β-sitosterol, (+)-kobusin, (+)-eudesmin, trans-N-feruloyltyramine, trans-N-coumaroyltyramine, trans-N-feruloyl-3-O-methyldopamine, aristolact...

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