Isoflavone tetraglycosides from Sophora japonica Leaves |
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Authors: | Tang Yuping Yang Ruolin Duan Jin-Ao Shang Erxin Su Shulan Zhu Min Qian Dawei |
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Affiliation: | Nanjing University of Chinese Medicine, Nanjing, People's Republic of China. yupingtang@njutcm.edu.cn |
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Abstract: | Two new isoflavone tetraglycosides ( 1 and 2) and six known compounds were isolated from the leaves of Sophora japonica. The new glycosides are genistein 7- O-beta- d-glucopyranoside-4'- O-(6'- O-alpha- l-rhamnopyranosyl)-beta-sophoroside ( 1) and genistein 7- O-alpha- l-rhamnopyranoside-4'- O-(6'- O-alpha- l-rhamnopyranosyl)-beta-sophoroside ( 2). The structures of compounds 1 and 2 were established primarily by NMR experiments and chemical methods, and they are the first reported naturally occurring isoflavone glycosides with four attached sugar residues. |
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