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Fig. 1 | BMC Pharmacology and Toxicology

Fig. 1

From: Cytotoxicity of Plumbagin, Rapanone and 12 other naturally occurring Quinones from Kenyan Flora towards human carcinoma cells

Fig. 1

Chemical structures of the tested compounds. Chrysophanol (1), emodin (2), 3,6,8-trihydroxy-1-methylanthraquinone-2-carboxylic acid methyl ester (3), a naphthaquinone; 5-hydroxy-2-methyl-1,4-naphthalenedione or plumbagin (4), benzoquinones; 2,5-dihydroxy-3-ethyl-2,5-cyclohexadiene-1,4-dione (5), 2,5-dihydroxy-3-propyl-2,5-cyclohexadiene-1,4-dione (6), 2,5-dihydroxy-3-butyl-2,5-cyclohexadiene-1,4-dione (7), 2,5-dihydroxy-3-heptyl-2,5-cyclohexadiene-1,4-dione (8), 2,5-dihydroxy-3-tridecyl-2,5-cyclohexadiene-1,4-dione or rapanone (9), 2,5-dihydroxy-3-pentadecyl-2,5-cyclohexadiene-1,4-dione (10), 2-hydroxy-5-methoxy-3-undecyl-1,4-benzoquinone, 5-O-methylembelin (11), 2,5 dimethoxy-6-(14-nonadecenyl)-1,4-benzoquinone (12), 1,2,4,5-tetraacetate-3-methyl-6-(14-nonadecenyl)-cyclohexadi-2,5-diene (13), ardisiaquinone B (14)

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