A-seco-oleane-type triterpene acids from Ligularia intermedia.
From the roots of Ligularia intermedia, two new naturally occurring 3,4-seco-oleanolic triterpene acids were isolated. Their structures were elucidated as A-homo-3a-oxa-olean-12-en-3-one-28-oic acid and 3,4-seco-olean-12-en-4-ol-3,28-dioic acid by spectroscopic methods and chemical transformations. In addition, six known compounds were also obtained from this plant.
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