Abstract
Fourteen compounds were isolated from the 95% ethanol reflux extract of Asarum sieboldii Miq. var. Seoulense Nakai, including five phenanthrene derivatives (1–5), three isobutyl amides (6–8), three phenylpropanoids (9–11) and three lignins (12–14). The structures of these compounds were identified by spectroscopic methods and by comparison with the reported spectroscopic data. Among them, compounds 6 and 11 were firstly reported from the family Aristolochiaceae, and compounds 3 and 4 were reported for the first time from the genus Asarum. Additionally, compounds 1, 2 and 8 were isolated from A. sieboldii Miq. var. Seoulense Nakai for the first time. These compounds have shown chemical relationships between A. sieboldii Miq. var. Seoulense Nakai and other species of Asarum as well as those found in the genus Aristolochia in the family Aristolochiaceae.
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