作者:Churng-Werng Chang、Tien-Shung Wu、Yih-Shou Hsieh、Sheng-Chu Kuo、Pei-Dawn Lee Chao
DOI:10.1021/np980313w
日期:1999.2.1
A new natural product, 4-epifriedelin (1), and 12 known terpenoids have been isolated from the leaves of Syzygium formosanum. The known compounds include caryophyllene oxide, friedelin, canophyllal, glutinol, alpha-terpineol, phytol, betulinic acid, uvaol, lupeol, betulin, ursolic acid, and oleanolic acid. All of these compounds are reported for the first time from S. formosanum.
Elaeodendrol and elaeodendradiol, new nor-triterpenes from Elaeodendron glaucum
作者:A.S.R. Anjaneyulu、M. Narayanarao
DOI:10.1016/0031-9422(80)83076-7
日期:1980.1
Abstract The isolation of six known and two new D:A-friedooleananes is reported from the bark of Elaeodendronglaucum . The structures of the newnor-triterpenes, elaeodendrol and elaeodendradiol, were established respectively as 17β- hydroxy-28-norfriedelan-3-one and l7β,25-dihydroxy-28-norfriedelan-3-one by a study of the methyl chemical shifts in their 1 H NMR spectra.
Two new trioxygenated
D:A-friedooleananes from the stem bark of Elaeodendron
glaucum have been shown to be the angular methyl dioxygenated
25,28-dihydroxy-D:A-friedooleanan-3-one (2) and 25-hydroxy-3-oxo-D:A-friedooleanan-28-al
(3).