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|Section2= |Section3= }} 2,3,5,6,7,8-Hexahydroxy-1,4-naphthalenedione, also called hexahydroxynaphthoquinone or spinochrome E,〔 T. W. Goodwin, E. Lederer and L. Musajo (1951), ''The nomenclature of the spinochromes of sea urchins''. Cellular and Molecular Life Sciences, Volume 7, Number 10, pages 375-376. 〕 is an organic compound with formula . It is formally derived from naphthoquinone (1,4-naphtalenedione) through replacement of all six hydrogen atoms by hydroxyl (OH) groups. The numerical prefixes "2,3,5,6,7,8" are superfluous, since there is no other hexahydroxy derivative of 1,4-naphthoquinone. The substance forms red micro-needles which do not melt below 300 °C, and can be sublimed in vacuum at about 265 °C. The compound occurs in the shell ("test") and spines of the sea urchins ''Paracentrotus lividus'' and ''Psammechinus miliaris''. The compound can be produced by condensation of 3,4,5,6-tetramethoxyphthalaldehyde with glyoxal.〔 H. A. Anderson and R. H. Thomson (1966), ''Naturally Occurring Quinones. Part VIP Synthesis of Spinochrome E''. J. Chem. Soc. series C (Organic), pages 426-428. 〕 == See also == * Hexahydroxy-2,3-naphthalenedione, a structural isomer. * Tetrahydroxybenzoquinone * Octahydroxyanthraquinone 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hexahydroxy-1,4-naphthalenedione」の詳細全文を読む スポンサード リンク
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