Isolation and characterization of Brachystemidines A-E, novel alkaloids from Brachystemma calycinum.
Five novel alkaloids, brachystemidines A-E (1-5), were isolated from the roots of Brachystemma calycinum. Their structures were established by spectral data, especially by 1D and 2D NMR techniques. The crystal structure of brachystemidine D was determined via X-ray diffraction analysis.
Cheng
Yong-Xian
YX
Laboratory of Phytochemistry, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming 650204, People's Republic of China.
Zhou
Jun
J
Tan
Ning-Hua
NH
Teng
Rong-Wei
RW
Lu
Yang
Y
Wang
Cheng
C
Zheng
Qi-Tai
QT
D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D029748:Caryophyllaceae / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
D000470:Alkaloids; D004365:Drugs, Chinese Herbal