Synthesis, cytotoxicity, and antioxidative activity of minor prenylated chalcones from Humulus lupulus

[摘要]：The minor hop (Humulus lupulus) chalcones 3'-geranylchalconaringenin (3), 5'-prenylxanthohumol (4), flavokawin (5), xanthohumol H (8), xanthohumol C (9), and 1 '',2 ''-dihydroxanthohumol C (10) were synthesized. The non-natural chalcones 3'-geranyl-6'-O-methylchalconaringenin (2), 3'-methylflavokawin (6), and 2'-O-methyl-3'-prenylchalconar-. ingenin (7) were also synthesized. Cytotoxicity was investigated in HeLa cells, and these compounds all had IC50 values comparable to xanthohumol (8.2-19.2 mu M). The ORAC-fluorescein assay revealed potent antioxidative activity for 7 and 8 with 5.2 and 4.8 Trolox equivalents, respectively.

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