Author's personal copy M.-M. Liu et al./ European Joumal of Medicinal Chemistry 52(2012)33-43 Table 3(continued) Compound Structure ECso (uM) OH HO 144 Chalcone 36.1 HO OH Anthraquinone >50 HO Flavonol 519 H OH 47.29 OH HO OH Flavonol HO Flavonol 4691a OH (continued on next page)Author's personal copy Table 3 (continued ) Compound Structure Classification EC50 (mM)a,b CC50 (mM) 22 O O HO OH OH OH Flavone 4.7 >50 23 O O HO OH OH Isoflavone 14.4 >50 24 HO OH OH O Chalcone 36.1 >50 25 OH O OH OH O Anthraquinone 20.8 >50 26 O O HO OH OH OH Flavonol 51.9%d >50 27 O O HO OH OH OCH3 OH Flavonol 47.29%d >50 28 O O HO OH OH OH OH OH Flavonol 46.9 >50 29 O O HO OH OH Flavonol 46.91%d >50 (continued on next page) M.-M. Liu et al. / European Journal of Medicinal Chemistry 52 (2012) 33e43 39