TEMPO-oxidized O-acetyl galactoglucomannan oligomers: isolation and comprehensive structural elucidation

ISOLATION AND STRUCTURAL ELUCIDATION OF THE FIRST KNOWN C-HOMOPROTOBERBERINE

A novel C-homoprotoberberine alkaloid, Hediamine (2), has been isolated from the roots of Berberis actinucantha (Berberidaceae). Conclusive proof for the structure of hediamine was obtained by its comparison with the isomeric lactam (4), by chemical transformation, and by means of spectroscopic techniques (UV, IR, MS, NMR).

Fermentation, Isolation, Structural Elucidation and Biological Activities

A fermentation broth of an unidentified fungus (N983-46) was found to produce DNAgyrase inhibitors, CJ-12,371 (1) and CJ-12,372 (2). Following isolation by solvent extraction and silica gel and ODS(reverse phase) chromatographies, the structures were determined to be novel spiro-ketal compounds with S-connguration at position C-l. CJ-12,371 and CJ-12,372 inhibit both DNA supercoiling and relaxa...

isolation and structural elucidation of natural products in euphorbia erythradenia

isolation and structural elucidation of the first known c-homoprotoberberine

a novel c-homoprotoberberine alkaloid, hediamine (2), has been isolated from the roots of berberis actinucantha (berberidaceae). conclusive proof for the structure of hediamine was obtained by its comparison with the isomeric lactam (4), by chemical transformation, and by means of spectroscopic techniques (uv, ir, ms, nmr).

Isolation, Purification and Structural Elucidation of N-Acetyl-5- Methoxytryptamine (Melatonin) From Crataeva nurvala Buch-Ham Stem Bark

The objectives of current study were to isolate, purify and characterize bioactive tryptamine derivative from Crataeva nurvala, a well explored traditional Indian medicinal plant with historical evidence of efficacy in the treatment of neurological and antioxidant deficiency related disorders. In this study, chloroform fraction of ethanolic extract of Crataeva nurvala stem bark was analyzed usi...