Two new xanthones, calozeyloxanthone and zeyloxanthonone, from Calophyllum zeylanicum(Guttiferae)
作者:Sarath P. Gunasekera、Subramaniam Sotheeswaran、M. Uvais S. Sultanbawa
DOI:10.1039/p19810001831
日期:——
Two new xanthones, calozeyloxanthone (1) and zeyloxanthonone (4), have been isolated from the bark of C. zeylanicum as well as betulinic acid, friedelan-3β-ol, calabaxanthone, taraxerone, friedelin, taraxerol, and β-sitosterol. Zeyloxanthonone (4) is identical with wightianone and the structure of the latter is revised. The timber of C. zeylanicum yielded 6-deoxyjacareubin (11), 1,6-dihydroxy-5-methoxyxanthone
两个新的氧杂蒽酮,calozeyloxanthone(1)和zeyloxanthonone(4),已经从树皮中分离C.锡兰以及桦木酸,friedelan-3β醇,calabaxanthone,taraxerone,木栓,蒲公英赛醇,β谷甾醇。Zeyloxanthonone(4)与Wightianone相同,后者的结构也有所修改。的木材C.锡兰得到6- deoxyjacareubin(11),1,6-二羟基-5- methoxyxanthone,1,5- dihydroxyxanthone,1,7- dihydroxyxanthone,2- hydroxyxanthone,和jacareubin。