نتایج جستجو برای: tri aryl structure
تعداد نتایج: 1593907 فیلتر نتایج به سال:
We construct a local tri-Hamiltonian structure of the Ablowitz–Ladik hierarchy, and compute central invariants associated bihamiltonian structures. show that one structures are equal to 1 24 , dispersionless limit this coincides with is defined on jet space Frobenius manifold Gromov–Witten P . This result provides support for validity Brini’s conjecture relation these hierarchy. • A hierarchy p...
We report a new method for the preparation of chiral 2-aryl-2-fluoropropanoic acids, including 2-fluoroibuprofen, a fluorinated analogue of non-steroidal anti-inflammatory drugs (NSAIDs), by the kinetic resolution of racemic 2-aryl-2-fluoropropanoic acids using enantioselective esterification. By applying pivalic anhydride (Piv2O) as a coupling agent, bis(α-naphthyl)methanol [(α-Np)2CHOH] as an...
Structural analyses of the protein-tyrosine phosphatase 1B (PTP1B) active site and inhibitor complexes have aided in optimization of a peptide inhibitor containing the novel (S)-isothiazolidinone (IZD) phosphonate mimetic. Potency and permeability were simultaneously improved by replacing the polar peptidic backbone of the inhibitor with nonpeptidic moieties. The C-terminal primary amide was re...
The combination of trimesic acid and the tri-dentate linker 1,3,5-tri(4-pyridyl)-2,4,6-triazine leads to the assembly of a bilayer structure, which contains four pyrene molecules per cavity; adjacent tetrameric aggregates within the channels formed by the superimposed layers combine to yield pyrene nano-rods.
1. Sodium (N-acetyl-N-phenylhydroxylamine beta-d-glucosid)uronate was isolated from the urine of rabbits receiving N-acetyl-N-phenylhydroxylamine. 2. Its chemical structure was confirmed by the correspondence of the infrared spectrum of its tri-O-acetyl methyl ester derivative with the tri-O-acetyl methyl ester derivative of an authentic specimen prepared by the Koenigs-Knorr synthesis.
Phorbol esters and their derivatives, such as TPA, have been reported potential natural antitumor products, with some derivatives entering clinical research for leukemia treatment. In this study, 16 phorbol were synthesized from phorbol, anti-leukemia activity against Jurkat, HL-60, K562 tested. The results showed that several had activity, 5B demonstrating the strongest cytotoxic cell line (IC...
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