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. 2020 Dec 18;11:554777. doi: 10.3389/fphar.2020.554777

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Copyright © 2020 Dai, Wang, Zhao, Yan, Zhu, Li, Qin, Verpoorte and Chen

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The mean chromatograms of isoflavonoids used as representative fingerprint chromatograms in analyses of the extracts of Astragali radix pieces (S1), freeze-dried powders (S2), and formula granules (S3) by HPLC-DAD at 260 nm [F1: calycosin 7-O-β-D-glucoside; F2: calycosin 7-O-β-D-glucoside-6″-O-malonate; F3: formononetin-7-O-glucoside; F4: (6αR, 11αR)-3-hydroxy-9,10-dimethoxypterocarpan-3-O-β-D-glucoside; F5: (3R)-7,2′-dihydroxy-3′,4′-dimethoxyisoflavan-7-O-β-D-glucoside; F6: 6″-O-malonylononin; F7: calycosin; F8: formononetin; F9: (6αR, 11αR)-3-hydroxy-9,10-dimethoxypterocarpan; F10: (3R)-7,2′-dihydroxy-3′,4′-dimethoxyisoflavan].