Nuclear-magnetic-resonance and mass-spectral study of myxinol tetra-acetate.

New evidence for the structure of myxinol.

1. Preliminary spectroscopic examination of a second component of hagfish bile salts suggested that it might be 3beta,7alpha,26(27)-trihydroxy-5alpha-cholestane. 2. Impure reduction products of the 3beta,26(27)-dihydroxycholestane-7,16-dione previously made from myxinol disulphate appeared also to have the 5alpha-configuration. 3. Infrared, nuclear-magnetic-resonance and mass-spectrographic as ...

Nuclear-magnetic-resonance and mass-spectral analysis of ranol tetra-acetate.

NUCLEAR MAGNETIC RESONANCE STUDY OF THE STRUCTURE OF GLYOXALDIHYDRAZONE

Study of the nuclear magnetic resonance spectra of glyoxaldihydrazone in dimethylsulfoxide and deuterochlorofonn leads to the conclusion that this compound exists predominantly in non-chelate structure

Computational study of energetic, stability, and nuclear magnetic resonance of BN nanotube as a nanosensor

Now a day study on boron nitrid nanotubes are in considerable attetion due to their unique properties in different field of science. In this letter, after final optimization, thermodynamic properties analysis, stabilities, electronic structure and nuclear magnetic resonance parameters including σ isotropic and σ anisotropic tensors and asymmetric parameters of 15N and 11B nuclei are calculated....

Acylated Flavonoid from Vaccinium Corymbosum (Ericaceae) Flowers with Yeast α-Glucosidase Inhibitory Activity

Purpose: To isolate and identify chemical constituents with yeast α-glucosidase inhibitory activity from the methanol extract of V. myrtillus (blueberry) flowers. Methods: The active fraction (ethyl acetate extract) were chromatographed on C18 MPLC column, Sephadex LH-20 column and semi-preparative HPLC column. The isolated compounds were identified by the extensive H-nuclear magnetic resonance...