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Antimicrobial isoflavans from Astragalus species
N A el-Sebakhy1, A M Asaad, R M Abdallah
1Department of Pharmacognosy, Faculty of Pharmacy, Alexandria University, Egypt.
Phytochemistry
|August 1, 1994
Abstract:
Two new antimicrobial isoflavans, 1-[(3R)-7,8-dimethoxybenzopyranyl]-4- hydroxybenzoquinone (astragaluquinone) and (3S)-7,1'-dihydroxy-8,3'-dimethoxyisoflavan (8-methoxyvestitol), and the known 7-hydroxy-2',3',4'-trimethoxyisoflavan were isolated from roots of Astragalus alexandrinus and A. trigonus. The structures of the new isoflavans were established by spectroscopic methods.