Complete assignments of 1H and 13C NMR data for new dibenzocyclooctadiene lignans from Kadsura oblongifolia.
Two new dibenzocyclooctadiene lignans, named kadoblongifolins A (1) and B (2), and one new natural product dibenzocyclooctadiene lignan, named kadoblongifolin C (3), were isolated from the stems of Kadsura oblongifolia (K. oblongifolia), together with five known ones, schizanrin F (4), propinquanin C (5), schisantherin G (6), heteroclitin Q (7), kadsurarin (8). The structures of these new lignans were elucidated by a combination of high-resolution electron ionization mass spectrometry (HR-EI-MS), (1)H NMR, (13)C NMR, HMQC, HMBC, and NOESY spectra.
Liu
Hai-Tao
HT
Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, PR China.
Xu
Li-Jia
LJ
Peng
Yong
Y
Yang
Jun-Shan
JS
Yang
Xiu-Wei
XW
Xiao
Pei-Gen
PG
D002247:Carbon Isotopes; D034242:Cyclooctanes / Q000737:chemistry*; D006859:Hydrogen; D032135:Kadsura / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure
D002247:Carbon Isotopes; D034242:Cyclooctanes; D017705:Lignans; C511097:dibenzocyclooctadiene; C542719:kadoblongifolin A; C542720:kadoblongifolin B; C542721:kadoblongifolin C; D006859:Hydrogen