Tokinolide B

Nat Prod Res. 2011 Aug;25(13):1234-42.

Phthalides and other constituents from Ligusticum porteri; sedative and spasmolytic activities of some natural products and derivatives.[Pubmed: 21797735 ]

METHODS AND RESULTS:
The chemical constituents of the organic extracts from the rhizomes of Ligusticum porteri were isolated, characterised and identified as Z-ligustilide, Z-butylidenephthalide, diligustilide, Tokinolide B, riligustilide, senkyunolides F and I, ferulic acid, among other known compounds. The preparation of 4,5-dehydroTokinolide B from Tokinolide B is reported, and its structure confirmed by X-ray analysis. The sedative and spasmolytic activities of some of these natural products and derivatives were evaluated by applying them to in vivo and in vitro models.
CONCLUSIONS:
Several of these dimeric phthalides displayed sedative and spasmolytic properties that may correlate with some popular uses of L. porteri.

Zhongguo Zhong Yao Za Zhi. 2008 Oct;33(19):2196-201.

Study on biligustilides from Angelica sinensis.[Pubmed: 19166005]

To study the chemical constituents of Angelica sinensis.
METHODS AND RESULTS:
The constituents were separated by chromatographic methods, and their structures were identified on the basis of spectroscopic analysis. Eight compounds were isolated and identified as levistolide A (1), senkyunolide O (2), (3Z, 3Z')-6.8', 7.3'-diligustilide (3), Tokinolide B (4), isoTokinolide B (5), (3'Z)-(3R, 8S, 3a'R, 6'S)-3, 3a': 8, 6'-biligustilide (6), E, E'-3. 3', 8. 8'-diligustilide (7) and E, E'-3. 3', 8. 8'-isodiligustilide (8), which are all diligustilides.
CONCLUSIONS:
Compound 7 was obtained from the plant for the first time; compounds 6 and 8 are new compounds.