Cyclopeptide alkaloids from Paliurus ramossisimus.
Seven zizyphine A-type cyclopeptide alkaloids were isolated from the roots of Paliurus ramossisimus by the combination of centrifugal partition chromatography and conventional separation methods. The novel structures of paliurines A-F (1-6) were characterized and established on the basis of MS and elaborate NMR spectral analyses. Terminal dipeptide stereochemistry was confirmed by correlation with the synthetic dipeptides via comparison of their (13)C NMR data.
Lin
H Y
HY
School of Pharmacy, College of Medicine, National Taiwan University, Taipei 100, Taiwan, Republic of China.
Chen
C H
CH
You
B J
BJ
Liu
K C
KC
Lee
S S
SS
D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000737:chemistry*; D019685:Rosales / Q000737:chemistry; D013624:Taiwan
D000470:Alkaloids; D010456:Peptides, Cyclic