A new biflavonoid from Aristolochia contorta |
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Authors: | Yu Li-Li Huang Rong Lv Yu-Ping Zhao Yong Chen Yegao |
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Institution: | Department of Chemistry, Yunnan Normal University, PR China. |
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Abstract: | From the fruits of Aristolochia contorta Bge, beside the known aristolochic acids IVa and VII, aristolactam-N-beta-D-glucopyanoside, aristoloctam Ia N-beta-D-glucopyanoside, pinitol and daucosterol, a new biflavonoid was isolated. Its structure was determined as (+/-)-2"R,3"R-dihydro-3"-hydroxyamentoflavone (1) by means of spectral methods including 1D-, 2D-NMR and HR-ESIMS and the known compounds were identified on the basis of comparing their NMR data with those of the corresponding compounds in the literature. |
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