New cytotoxic lupane lactones from Kokoona ochracea.
New cytotoxic lupane lactones from Kokoona ochracea.
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来自 Kokoona ochracea 的新型细胞毒性羽扇豆烷内酯。
DOI:
10.1021/np50077a019
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发表时间:
1991
影响因子:
5.1
通讯作者:
Farnsworth,NR
中科院分区:
文献类型:
--
作者:
Ngassapa,OD;Soejarto,DD;Che,CT;Pezzuto,JM;Farnsworth,NR
Three new compounds, ochraceolides A [1], B [2], and C [3], were isolated from nonpolar extracts derived from Kokoona ochracea stem bark. Based on spectroscopic data, their structures were determined to be the closely related lupane lactones: 3-oxolup-20 (29)-en-30.2 lot-olide [1], 20, 29-epoxy-3-oxolupan-30, 2 1 ot-olide [2], and 3, 6-dioxolup-20 (29)-en-30.2-olide [3]. Compounds 1 and 3 exhibited significant cytotoxic activity with cultured P-388 cells (ED; o values of 0.26 and 0.53 µg/ml, respectively) but were at least tenfold less active with a variety of human tumor cell lines. Compound 2 was weakly active with cultured P-388 and KB-3 cells (ED50 values of 7.8 and 5.2 µg/ml, respectively), but no significant activity was observed with other human cancer cell types (ED; o values of more than 20 µg/ml).Kokoona ochracea (Elm.) Merrill (Celastraceae) is one of eight species in the genus. It is distributed in the Malay Peninsula, Borneo, and Palawan Island of the Philippines (1). There is no local medicinal use of this plant among the Palawan inhabitants, nor could we find any documented medicinal use elsewhere. However, in Palawan at least, the tree finds application as a source of timber and fire wood. The bark contains an in-flammable oil (1), and an asphalt-like residue remains after combustion. The leaves also burn readily, producing a crackling noise like that of a firecracker. Hence, the common name “Repetik” is used in Palawan.
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影响因子:
2.9
作者:
Nagy,JA;Meinwald,YC;Scheraga,HA
通讯作者:
Scheraga,HA
影响因子:
64.5
作者:
K. Rubin;M. Höök;B. Öbrink;R. Timpl
通讯作者:
R. Timpl
影响因子:
64.5
作者:
H. Urushihara;M. Takeichi
通讯作者:
M. Takeichi
DOI:
10.1016/s0021-9258(18)60653-2
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
M. P. Fernández;O. Selmin;G. Martin;Y. Yamada;M. Pfäffle;R. Deutzmann;J. Mollenhauer;K. von der Mark
通讯作者:
K. von der Mark
DOI:
10.1016/s0006-291x(88)81211-7
发表时间:
1988
影响因子:
3.1
作者:
Santoro,SA;Rajpara,SM;Staatz,WD;WoodsJr,VL
通讯作者:
WoodsJr,VL