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Updated: Aug 25, 2026
Quantitative 31P NMR Analysis of Lignins and Tannins
Published on: August 2, 2021
[Isolation and structure identification of lignans from pine needles of pinus massoniana Lamb]
Wei-sheng Feng1, Xiao-ke Zheng, Yan-zhi Wang
1Henan College of Traditional Chinese Medicine, Zhengzhou 450008, China. fwsh@371.net
Aim:
To study the chemical constituents from the water-extracts of pine needles of Pinus massoniana Lamb.
Methods:
Chromatographic techniques were used to separate and purify compounds. Their physico-chemical properties and spectral data (UV, IR, MS, 1H-1H, 13C-1H NMR, DEPT, HMBC etc.) were used to elucidate the structures.
Results:
Three lignans were isolated from the n-BuOH fraction of water-extracts. Their structures were identified as (7S,8R)-3',4,9'-tridihydroxy-4-methoxy- 9-O-shikimoyl-7,8-dihydrobenzofuran-1'-propylneolignan (massonianoid A, I), (7S,8R)-4,9-dihydroxy-3,3'-dimethoxy-7,8- dihydrobenzofuran-1'-propylneolignan (II) and 4,4',8-trihydroxy-4,4'-dimethoxy-9-lignanolide (III).
Conclusion:
Compound I is a new compound. While II and III were isolated from this plant for the first time.
