Retusin (flavonol)1245-15-430 % similar 3-(Beta-D-Glucopyranosyloxy)-1,7-dihydroxy-2,8-dimethoxy-6-methyl-9,10-anthracenedione129025-96-330 % similar Quercetin 3,4′-dimethyl ether33429-83-330 % similar Tamarixetin603-61-230 % similar