アリドオシ属の成分について (第1報)

ジュズネノキ, コバノジュズネノキ, ヒメアリドオシのアントラヒノン色素 その1

抄録

Anthraquinone pigments were isolated from Damnacanthus major Sieb. et Zucc., D. major Sieb. et Zucc. var. parvifolius Koidz., and D. indicus Gaertner fil. var. microphyllus Makino (Rubiacea family), and were designated as follows: Damnacanthal (m.p. 208°), juzunal (m.p. 248°), damnacanthol (m.p. 288°), damnidin (m.p. 180°), and a neutral substance (m.p. 160°). Of these, damnacanthal is identical with the substance, C₁₆H₁₀O₅ (B), isolated by Perkin from Morinda umbellata L. It is an anthraquinone containing α-methoxyl and is saponified by sulfuric acid or alkali to form nordamnacanthal, m.p. 218°, which is the decarboxylation product of m.p. 218° obtained by Perkin. Heating of damnacanthal with alkali yielded purpuroxanthin.