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High-performance liquid chromatography-mass spectrometry chromatogram fingerprinting of XS-5 and XS-6. (a) Peaks of XS-5 and XS-6 were deduced based on comparing individual peak retention times with those of the authentic reference substance and verified by LC-MC. (b) Scheme for how XS-5 and XS-6 induce apoptosis and inhibit the growth of HCC cells.
