Stilbene glucosides from the bulbs of Iris tingitana

Two new dimeric stilbene glucosides, tingitanol A ( 1) and tingitanol B ( 2) along with four known compounds were isolated from the bulbs of Iris tingitana. Their structures were established on the basis of spectroscopic methods. Two new dimeric stilbene glucosides, tingitanol A ( 1) and tingitanol...

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Bibliographic Details
Published in:Phytochemistry letters 2009-11, Vol.2 (4), p.148-151
Main Authors: Farag, Salwa F., Takaya, Yoshiaki, Niwa, Masatake
Format: Article
Language:English
Subjects:
Free radical scavenging activity
Iridaceae
Iris tingitana
Isoflavones
Stilbene glucosides
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Summary:Two new dimeric stilbene glucosides, tingitanol A ( 1) and tingitanol B ( 2) along with four known compounds were isolated from the bulbs of Iris tingitana. Their structures were established on the basis of spectroscopic methods. Two new dimeric stilbene glucosides, tingitanol A ( 1) and tingitanol B ( 2) together with trans-resveratrol 3- O-glucopyranoside ( 3) in addition to three known isoflavones, 5- O-methylgenistein ( 4), 5- O-methylgenistein 7- O-β- d-glucopyranoside ( 5) and betavulgarin ( 6) have been isolated for the first time from the fresh bulbs of Iris tingitana Boiss. & Reut. Their structures were established on the basis of the spectral data and direct comparison with values from previously identified analogues. Additionally, the isolated compounds ( 1– 6) were evaluated for the free radical scavenging activity.
ISSN:1874-3900
1876-7486
DOI:10.1016/j.phytol.2009.05.001