科研之友
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摘要
Two new flavonoid glycosides, excavaside A (1) and B (2), together with 14 known compounds, myricetin 3-O-beta-rutinoside (3), myricetin 3,3'-di-alpha-L-rhamnopyranoside (4), myricetin 3'-a-L-rhamnopyranoside (5), myricitrin (6), myricetin (7), quercitrin (8), clauslactone B (9), clauslactone A (10), murrayacoumarin C (11), clauslactone E (12), triphasiol (13), clauslactone P (14), seseline (15), and 5-geranyloxy-7-hydroxycoumarin (16) have been isolated from the ethanol extract of the leaves and twigs of Clausena excavata. Among them, compounds 3-5 and 13 were isolated and identified from this plant for the first time. The structures of the new compounds were established by spectroscopic data interpretation, particularly HRESIMS, 1D and 2D NMR data including HSQC and HMBC. Also, those of the known compounds were identified by spectral comparison with those of the reported values.
- 出版日期2017-6
