Aim To study the chemical constituents of Euphorbia ebracteolata Hayata. Methods Column chromatography was used in the isolation procedure, while the structures of isolated compounds were elucidated by spectral data...Aim To study the chemical constituents of Euphorbia ebracteolata Hayata. Methods Column chromatography was used in the isolation procedure, while the structures of isolated compounds were elucidated by spectral data. Results Six compounds were isolated and their structures were identified as baccatin (1), 3-acetyl-β-amyrin (2), 3,3′-diacetyl-4,4′-dimethoxy- 2,2′,6,6′-tetrah ydroxy diphenylmethane (3), 2,4-dihydroxy-6-methoxy-3-methyl acetophenone (4), β-sitosterol (5), and daucosterol (6). Conclusion Baccatin was obtained from Euphorbia ebracteolata for the first time.展开更多
A new ent-abietane diterpernoid,named ebracteolata D(1),along with 11 known analogues,was isolated from the roots of Euphorbia ebracteolata Hayata.The structure of 1 was elucidated on the basis of spectroscopic analys...A new ent-abietane diterpernoid,named ebracteolata D(1),along with 11 known analogues,was isolated from the roots of Euphorbia ebracteolata Hayata.The structure of 1 was elucidated on the basis of spectroscopic analysis and molecular modeling.Cytotoxicity of compounds 1-12 was evaluated as well as the effect on the NF-κB pathway.Among them,compound 12,jolkinolide B,displayed broad inhibitory effects against proliferation of tumor cell lines.Mechanistic studies indicated that the compound 12 can inhibit TNF-αinduced NF-κB activation,thereby inducing tumor cell apoptosis.展开更多
文摘Aim To study the chemical constituents of Euphorbia ebracteolata Hayata. Methods Column chromatography was used in the isolation procedure, while the structures of isolated compounds were elucidated by spectral data. Results Six compounds were isolated and their structures were identified as baccatin (1), 3-acetyl-β-amyrin (2), 3,3′-diacetyl-4,4′-dimethoxy- 2,2′,6,6′-tetrah ydroxy diphenylmethane (3), 2,4-dihydroxy-6-methoxy-3-methyl acetophenone (4), β-sitosterol (5), and daucosterol (6). Conclusion Baccatin was obtained from Euphorbia ebracteolata for the first time.
基金supported financially by grants from the National Science Foundation of China(21432010,81573323,and 31770392)Technological Leading Talent Project of Yunnan Province(2015HA020)Central Asian Drug Discovery and Development Center of Chinese Academy of Sciences(CAM201402,CAM201302).
文摘A new ent-abietane diterpernoid,named ebracteolata D(1),along with 11 known analogues,was isolated from the roots of Euphorbia ebracteolata Hayata.The structure of 1 was elucidated on the basis of spectroscopic analysis and molecular modeling.Cytotoxicity of compounds 1-12 was evaluated as well as the effect on the NF-κB pathway.Among them,compound 12,jolkinolide B,displayed broad inhibitory effects against proliferation of tumor cell lines.Mechanistic studies indicated that the compound 12 can inhibit TNF-αinduced NF-κB activation,thereby inducing tumor cell apoptosis.
