Abstract
Seven new phloroglucinol derivatives, uraliones L-R (1–7), were isolated from the whole plant of Hypericum urialum. The structures of new compounds were unambiguously elucidated by comprehensive spectroscopic analysis, and the absolute configurations of the vic-diol groups were determined by Mo2(OAc)4-induced electronic circular dichroism experiments. Their capability to reversal the multidrug resistance in doxorubicin-induced resistant MCF-7/DOX sublines showed that compounds 1, 5, 6, 7 exerted a potential effect of doxorubicin susceptibility.
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