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【期刊论文】Eudesmane and megastigmane glucosides from Laggera alata
赵昱, Qunxiong Zheng a, c, Zhaojun Xu a, Xianfeng Sun b, Wei Yao a, Handong Sun b, Christopher H. K. Cheng d, Yu Zhao a, *
Phytochemistry 63(2003)835-839,-0001,():
-1年11月30日
This paper is dedicated to Professor Dr. Xiao-Tian Liang on the occasion of his 80th birthday. Abstract Four eudesmane glucosides, alatosides A-D (1-4), and one megastigmane glucoside, alatoside E (5), were isolated from the BuOH fraction of Laggera alata along with six known compounds. Structures of the new compounds were elucidated by a combination of chemical and spectroscopic methods. Alatosides A–E were characterized as: 1a-O-(b-d-glucopyranosyloxyl)-7-epi-eudesma-11-en-2b,4a-diol (1), 2b-O-(b-d-glucopyranosyloxyl)-eudesma-4a-hydroxyl-11(13)-en-12-oic-acid (2), 5b-O-(b-d-glucopyranosyloxyl)-eudesma-4(15),11(13)-dien-12-oic-acid (3), 5a-O-(b-d-glucopyranosyloxyl)-eudesma-3,11(13)-dien-12-oic acid (4) and 3b-O-(b-d-glucopyranosyloxyl)-megastigma-9-one (5), respectively. Based on the chemical characteristics of eudesmane derivatives isolated from the Laggera genus, it was suggested that there are probably two different biogenetic pathways for these secondary metabolites in this genus.
Laggera alata, Compositae, Eudesmane, Megastigmane, Alatoside
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【期刊论文】Eudesmane Derivatives and Other Sesquiterpenes from Laggera alata
赵昱, Qun Xiong Zheng, †, § Zhao Jun Xu, † Xian Feng Sun, ‡ Francüoise Guéritte, ┴ Michele Cesario, ┴ Han Dong Sun, ‡ Christopher H. K. Cheng, || Xiao-Jiang Hao, ‡ and Yu Zhao*
J. Nat. Prod. 2003, 66, 1078-1081,-0001,():
-1年11月30日
Three new eudesmane sesquiterpenes, 5
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【期刊论文】Synthesis of A/B Ring Analogs of Territrem B and Evaluation of their Biological Activities
赵昱
,-0001,():
-1年11月30日
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【期刊论文】Eudesmane derivatives from Laggera pterodonta
赵昱, Yecheng Xiao a, c, Qunxiong Zheng a, b, Qijun Zhanga, Handong Sunc, Fran
Fitoterapia 74(2003)459-463,-0001,():
-1年11月30日
A new eudesmane derivative, 4a,5a-dihydroxyeudesma-11(13)-en-12-oic acid, was isolated from Laggera pterodonta.Its structure was elucidated as (1) on the basis of spectroscopic evidence.Mor eover, six known compounds were isolated: pterodontriol A (2), pterodontriol B, pterodonta acid (3), ilicic acid (4), costic acid and b-amyrin.Cytotoxic activity of compounds 2, 3 and 4 was investigated.
Laggera pterodonta, 4a,, 5a-Dihydroxyeudesma-11(, 13), -en-12-oic acid, Cytotoxic activity
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【期刊论文】Combination of HPLC-NMR Techniques on Phytochemical Analysis of Torreya jackii
赵昱
,-0001,():
-1年11月30日
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