نتایج جستجو برای: 6 hydroxy 2578 tetramethylchroman 2 carboxylic acid
تعداد نتایج: 3541103 فیلتر نتایج به سال:
The structure of altemicidin, a new acaricidal and antitumor agent, was determined to be (1R,2S,3aR,7aS)-4-carbamoyl-2-hydroxy-6-methyl-1-(sulfamo ylacetamido)-2,3,3a,6, 7,7a-hexahydro-6-azaindene-1-carboxylic acid by a combination of spectroscopic and X-ray crystallographic analysis of its derivatives. Altemicidin is a monoterpene alkaloid.
Two new carbapenem antibiotics, carpetimycins C and D have been isolated from the culture broth of Streptomyces p. KC-6643, which produced carpetimycins A and B. The structures of carpetimycins C and D have been determined to be (5R,6R)-3-[2-acetamidoethyl(R)-sulfinyl]-6-(1-hydroxy-l-methylethyl)-7-oxo-l-azabicyclo[3.2.0]hept-2-ene-2-carboxylic a id and (5R,6R)-3-[2-acetamidoethyl-(R)-sulfinyl]...
abstract the cr(iii) and zn(ii) complexes with 2-((9,10-dihydro-1-hydroxy-9,10-dioxaanthracen-4-yloxy)carbonyl)benzoic acid as ligand have been prepared by reacting cr(no3) and zn(no3)2 and ligand in cloroform. the cr and zn complexes with 2-((9,10-dihydro-1-hydroxy-9,10-dioxaanthracen-4-yloxy)carbonyl) were also prepared in chloroform and aceton solutions. the uv-visible and ft-ir spectra of...
Superoxide activates nucleotide-sensitive mitochondrial proton transport through the uncoupling proteins UCP1, UCP2, and UCP3 (Echtay, K. S., et al. (2002) Nature 415, 1482-1486). Two possible mechanisms were proposed: direct activation of the UCP proton transport mechanism by superoxide or its products and a cycle of hydroperoxyl radical entry coupled to UCP-catalyzed superoxide anion export. ...
Mureidomycins (MRDs) E and F were isolated from a culture filtrate of Streptomyces flavidovirens SANK 60486 which produces MRDs A approximately D. They possessed the same molecular formulae, C39H48N8O12S and very similar UV, IR and NMR spectra, but differed clearly from each other in HPLC profile. From the hydrolysates of MRDs E and F, 8-hydroxy-1,2,3,4-tetrahydro-3-isoquinoline carboxylic acid...
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