PETEREIT, FRANK;KOLODZIEJ, HERBERT;NAHRSTEDT, ADOLF, PHYTOCHEMISTRY, 30,(1991) N, C. 981-985
作者:PETEREIT, FRANK、KOLODZIEJ, HERBERT、NAHRSTEDT, ADOLF
DOI:——
日期:——
Dodecaacetylprodelphinidin B3 from the dried leaves of Ziziphus spina-christi
作者:Klaus Weinges、Hartmut Schick
DOI:10.1016/0031-9422(94)00574-d
日期:1995.1
The ethanolic extract (10% of the dried leaves) of Ziziphus spina-christi was acetylated leading to the isolation of a crystalline dodecaacetylprodelphinidin B3, which has not been described in the literature. Its structure was determined on the basis of its H-1 and C-13 NMR spectra. The main components of the extract are glucose (4.4%), sucrose (21%), dimers, oligomers and polymers of prodelphinidins (16%), betulinic acid (1.7%), sitosterol beta-D-glucoside (2%), (+)-gallocatechin (1.7%) and (-)-epigallocatechin (0.9%). The structures of the crystalline peracetates were proven by comparison with the physical properties described in the literature. Proanthocyanidins and betulinic acid seem to be chemotaxonomically characteristic of Ziziphus species.