The anti-inflammatory activity of a coumarin and nine anthraquinone derivatives, 3-hydroxy-1-methoxy-2-methylanthraquinone (1), 2-hydroxymethyl anthraquinone (2), schimperiquinone B (3), cleomiscosin A (4), damnacanthal (5), 1,2-dihydroxy anthraquinone (6), damnacanthol (7),