3,12-ジヒドロ-6-ヒドロキシ-3,3,12-トリメチル-7H-ピラノ[2,3-c]アクリジン-7-オン

説明his acridinone alkaloid yields bright yellow needles when crystallized from AcOEt or C6H6. It is a very weak base and does not form stable salts. It is insoluble in alkalies and gives no reaction with CHlNl . With methyl sulphate and potassium carbonate, however, it is methylated, giving Acronycine (q.v.). The ultraviolet spectrum has absorption maxima at 255 and 285 mfJ. with shoulders at 305-310 and 410-415 mfJ., there also being an inflexion at 293 mfJ.. The p_x0002_toleuenesulphonate has been prepared as short, yellow needles from C6H6-light petroleum, m.p. l76-8°C. With FeC13 the alkaloid gives a deep green colour.