Results 211 to 220 of about 3,055,660 (264)

Absolute Configuration and Antibiotic Activity of Piceamycin.

Journal of Natural Products, 2020
The cultivation of a Streptomyces sp. SD53 strain isolated from the gut of the silkworm Bombyx mori produced two macrolactam natural products, piceamycin (1) and bombyxamycin C (2). The planar structures of 1 and 2 were identified by a combination of NMR,
Yern-Hyerk Shin, S. Kang, Woong Sub Byun, Changwook Jeon, B. Chung, J. Beom, Suckchang Hong, Jeeyeon Lee, Jongheon Shin, Youn-Sig Kwak, S. Lee, K. Oh, Y. Yoon, D. Oh   +13 more
semanticscholar   +1 more source

Absolute Configuration and Biological Activities of Meroterpenoids from an Endophytic Fungus of Lycium barbarum.

Journal of Natural Products, 2019
Eleven new meroterpenoids, bipolahydroquinones A-C (1-3), cochlioquinones I-N (4-8 and 11), and isocochlioquinones F and G (9 and 10), together with six known ones, were obtained from an endophytic fungus Bipolaris sp. L1-2 from Lycium barbarum. Compound
Yi Long, Ting Tang, Li-Ying Wang, B. He, K. Gao   +4 more
semanticscholar   +1 more source

Sesquiterpene Lactones from Artemisia argyi: Absolute Configuration and Immunosuppressant Activity.

Journal of Natural Products, 2019
A library of extracts from plants used in Chinese Traditional Medicine was screened for inhibition of T lymphocyte proliferation. An ethyl acetate extract from aerial parts of Artemisia argyi showed promising activity and was submitted to HPLC-based ...
Jakob K. Reinhardt, Amy Klemd, O. Danton, M. De Mieri, M. Smieško, R. Huber, T. Bürgi, C. Gründemann, M. Hamburger   +8 more
semanticscholar   +1 more source

Absolute Configuration of Franganine

Journal of Natural Products, 2012
The absolute configuration of franganine (1), a cyclopeptide alkaloid isolated from the methanol root bark extract of Discaria americana, was established on the basis of detailed NMR spectroscopic data and X-ray diffraction analysis of its salt (2).
Miguel S B, Caro, Leonardo H, de Oliveira, Vinicius, Ilha, Robert A, Burrow, Ionara I, Dalcol, Ademir F, Morel   +5 more
openaire   +2 more sources

Absolute Configuration of Cholesterol

Nature, 1954
IN the course of more extensive work on degradation of cholesterol, we have made a stereochemical correlation which seems to justify an interim report.
J W, CORNFORTH, I, YOUHOTSKY, G, POPJAK
openaire   +2 more sources

Absolute Configuration of Scyphostatin

Organic Letters, 2000
[reaction: see text] The absolute configuration of the side chain of scyphostatin (1) has been established. The chemical degradation of 1 gave 4 and 9, which correspond to the C7'-C12' and C13'-C16' fragments of the natural products, respectively. The spectroscopic data and [alpha]D values of both compounds were compared to those of authentic samples ...
, Saito, , Tanaka, , Fujimoto, , Kogen
openaire   +2 more sources

The absolute configuration of glucosamine

Biochimica et Biophysica Acta (BBA) - General Subjects, 1967
Abstract The absolute configuration of α- D -glucosamine hydrochloride has been determined by X-ray diffraction. The calculated Bijvoet differences in the intensity of the inverse reflections, arising out of the anomalous dispersion effect of the chlorine atom, agree well with those experimentally measured.
G N, Ramachandran, R, Chandrasekaran, K S, Chandrasekaran   +2 more
openaire   +2 more sources

Absolute Configuration of the Prostaglandins

Nature, 1966
A stereochemical diagram depicts the absolute configuration of the prostaglandins and of its parent molecule prostanoic acid. The systematic name of prostaglandin E1 is (-) 11 alpha 15(S)-dihydroxy-9-oxo-13trans-prostanoic acid.
D H, Nugteren, D A, Van Dorp, S, Bergström, M, Hamberg, B, Samuelsson   +4 more
openaire   +2 more sources

Absolute configuration of strictosidinic acid

Acta Crystallographica Section C Crystal Structure Communications, 2012
The absolute configuration of strictosidinic acid, (2S,3R,4S)-3-ethenyl-2-(β-D-glucopyranosyloxy)-4-{[(1S)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b]indol-1-yl]methyl}-3,4-dihydro-2H-pyran-5-carboxylate, was determined from its sodium chloride trihydrate, poly[[diaqua((2S,3R,4S)-3-ethenyl-2-(β-D-glucopyranosyloxy)-4-{[(1S)-2,3,4,9-tetrahydro-1H-pyrido[3,4-b ...
Rosane de P, Castro, Carolina da S, Matos, Cláudia A, do Nascimento, Cecília M A, Oliveira, Lucília, Kato, Luciano M, Lião, José R, Sabino   +6 more
openaire   +2 more sources

The absolute configuration of (−)-corbasil

Tetrahedron, 1968
Abstract The absolute configuration of (−)-corbasil (III) [3-(3′,4′-dihydroxyphenyl)-3-hydroxy-2-amino-propane] is established by relating it stereochemically at the α-carbon atom to (+)-2-(3,4-dimethoxyphenyl)-isopropylamine (V) of known configuration,5 by a series of reactions not involving this asymmetric centre.
M T, Farrugia, G, Kirk
openaire   +2 more sources