Diterpenoid glycosides from the bitter fern Gleichenia quadripartita.
Fifteen new diterpenoid glycosides (1a-n, 2) were isolated from an Argentine collection of the bitter fern Gleichenia quadripartita along with the known flavonoid glycoside afzelin. Structure elucidation was accomplished by 1D and 2D NMR spectroscopy and by high-resolution MS analyses. In addition, X-ray crystallographic analysis of a monocrystal of 1a as well as chemical derivatization of 1h and 1m were performed to confirm their structures.
Socolsky
Cecilia
C
Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, Tucumán, Argentina.
Asakawa
Yoshinori
Y
Bardón
Alicia
A
D001118:Argentina; D018360:Crystallography, X-Ray; D004224:Diterpenes / Q000737:chemistry* / Q000302:isolation & purification*; D029624:Ferns / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification*; D008362:Mannosides / Q000737:chemistry / Q000302:isolation & purification; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D044945:Proanthocyanidins / Q000737:chemistry / Q000302:isolation & purification
D004224:Diterpenes; D006027:Glycosides; D008362:Mannosides; D044945:Proanthocyanidins; C477954:afzelin