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Antioxidative Flavanone Glycosides from the Branches and Leaves of Viscum coloratum

Accession number;06A0025418

Title;Antioxidative Flavanone Glycosides from the Branches and Leaves of Viscum coloratum

Author; YAO HUI (Dep. Of Pharmacognosy, School Of Pharmacy, Fudan Univ.) YAO HUI (Res. Center Of Natural Products, Fudan Univ.) LIAO ZHI-XIN (Dep. Of Pharmacognosy, School Of Pharmacy, Fudan Univ.) LIAO ZHI-XIN (Res. Center Of Natural Products, Fudan Univ.) WU QIONG (School Of Life Sciences, Fudan Univ.) WU QIONG (Res. Center Of Natural Products, Fudan Univ.) LEI GUANG-QING (School Of Life Sciences, Fudan Univ.) LEI GUANG-QING (Res. Center Of Natural Products, Fudan Univ.) LIU ZHI-JUN (Medicinal Plant Lab., School Of Renewable Natural Resources, Louisiana State Univ. Agricultural Center) CHEN DAO-FENG (Dep. Of Pharmacognosy, School Of Pharmacy, Fudan Univ.) CHEN DAO-FENG (Res. Center Of Natural Products, Fudan Univ.) CHEN JIA-KUAN (School Of Life Sciences, Fudan Univ.) CHEN JIA-KUAN (Res. Center Of Natural Products, Fudan Univ.) ZHOU TONG-SHUI (School Of Life Sciences, Fudan Univ.) ZHOU TONG-SHUI (Res. Center Of Natural Products, Fudan Univ.)

Journal Title;Chem Pharm Bull

Journal Code:G0504A

ISSN:0009-2363

VOL.54;NO.1;PAGE.133-135 (J-STAGE)(2006)

Figure&Table&Reference;FIG.1, TBL.1, REF.16

Pub. Country;Japan

Language;English

Abstract;Two new flavanone glucosides, (2S)-homoeriodictyol 7,4'-di-O-.BETA.-D-glucopyranoside (4) and (2R)-eriodictyol 7,4'-di-O-.BETA.-D-glucopyranoside (5) were isolated from the branches and leaves of Viscum coloratum (KOMAR) NAKAI (Loranthaceae), along with three known flavanone glucosides: (2S)-homoeriodictyol 7-O-.BETA.-D-glucopyranoside (1), (2S)-eriodictyol 7-O-.BETA.-D-glucopyranoside (2), and (2S)-naringenin 7-O-.BETA.-D-glucopyranoside (3). The structures of these compounds were elucidated using spectroscopic methods. The antioxidant activities of these isolated compounds were evaluated by colorimetric methods based on their scavenging effects on hydroxyl radicals and superoxide anion radicals, respectively. All the compounds showed potent albeit varied degrees of antioxidative activities and the structure-activity relationship is discussed. (Author abst.)

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