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. 2019 Dec 13;19:368. doi: 10.1186/s12906-019-2782-3

Fig. 1.

Fig. 1

Characterization of HZ extract. a HPLC chromatograms of HZ extract. Two major peaks were identified in the HZ extract. b Ugonin J and (c) ugonin K were used as standards. The chemical structures of the ugonins are shown