| Structure Identification: |
| Chem Pharm Bull (Tokyo). 2007 Aug;55(8):1281-3. | | Lignans from Schisandra propinqua var. propinqua.[Pubmed: 17666862] |
METHODS AND RESULTS:
Two new dibenzocyclooctadiene lignans angeloyl-(+)-gomisin K(3) (1) and methylisogomisin O (2), together with six known ones, isogomisin O, Angeloylisogomisin O, gomisin O, angeloygomisin O, benzoylgomisin O, epigomisin O, and four 1,4-bis(phenyl)-2,3-dimethylbutane type lignans, pregomisin, meso-dihydroguaiaretic acid, isoanwulignan, and sphenanlignan were isolated from the aerial parts of Schisandra propinqua var. propinqua.
CONCLUSIONS:
The structures of 1 and 2 were elucidated by spectroscopic methods including extensive 1D- and 2D-NMR techniques. | | Zhongguo Zhong Yao Za Zhi. 2001 Oct;26(10):694-7. | | Studies on chemical constituents of Schisandra propinqua (Wall.) Hook. f. et Thoms.[Pubmed: 12776319] |
To isolate and characterize compounds from the stems of Schisandra propinqua.
METHODS AND RESULTS:
Extracting with solvent, isolating by column chromatography and identifying by the spectroscopic methods.
Six dibenzocyclooctadiene lignans were isolated and identified as tigloylgomisin P(1), angeloylgomisin O(2), Angeloylisogomisin O(3), kadsulignan L(4), (+/-) 5,8-epoxyl-6, 7-dimethyl-2',3',2",3"-dimethylenedioxy-4', 1"-dimethyl-1,2:3,4-dibenzo-1, 3-cyclooctadiene(5) and wuweizisu C(6).
CONCLUSIONS:
Compounds 4 and 5 were the first two dibenzocyclooctadiene lignans with an 6,9-epoxy bridge cycle discovered in the genus Schisandra. The others were originally isolated from S. propinqua. |
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