A Novel Dimeric Eremophilane from Ligularia virgaurea spp. Oligocephala

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A novel dimeric eremophilane, ligulolide B, was isolated from the alcoholic extract of the whole plant of Ligularia virgaurea spp. oligocephala. The structure was elucidated by various spectroscopic methods including intensive 2D NMR techniques (1H-1H COSY, gHMQC,gHMBC and 1H-1H NOESY) and HR-ESI-MS.
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