Five new diterpenoid alkaloids. 19-O-deethlyspiramine N (1), deacetylspiramine S (2), spiramidine A (3), spiramidine B (4) and deacetylspiramine F (5) were isolated from the aerial parts of Spirae japonica L. f. var o...Five new diterpenoid alkaloids. 19-O-deethlyspiramine N (1), deacetylspiramine S (2), spiramidine A (3), spiramidine B (4) and deacetylspiramine F (5) were isolated from the aerial parts of Spirae japonica L. f. var ovalifolia. Their structures were charaterized mainly based on spectral analysis.展开更多
A new diterpenoid, 15-O-acetylspiraminol (1), was isolated from the aerial parts of Spireae japonica L. f. var. ovalifolia. The structure was charaterized mainly based on spectral analysis.
Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 ...Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 was carried out on the basis of 1D and 2D NMR spectra.展开更多
Chemical investigation on the ethanol extract from the roots of Spiraea japonica var. acuta resulted in the isolation of two new diterpene alkaloids named spiratines A and B (1-2), respectively.
Abstract: Two new hetisine-type C20-diterpenoid alkaloids named spiraqine (1) and 6-hydroxylspiraqine (2), and four known alkaloids, namely spiredine (3), spiradine A (4), spiradine B (5), and spirasine V/VI (6), were...Abstract: Two new hetisine-type C20-diterpenoid alkaloids named spiraqine (1) and 6-hydroxylspiraqine (2), and four known alkaloids, namely spiredine (3), spiradine A (4), spiradine B (5), and spirasine V/VI (6), were isolated from Spiraea japonica L. f. var. fortunei(Planchon) Rehd. The structures of the alkaloids were elucidated using nuclear magnetic resonance analysis (1H-NMR, 13C-NMR, DEPT, HMQC, and HMBC) and mass spectrometry data.展开更多
基金the National Natural Science Foundation of China (NSFC) for outstanding young scientists to X. J. Hao (No. 39525025), which is g
文摘Five new diterpenoid alkaloids. 19-O-deethlyspiramine N (1), deacetylspiramine S (2), spiramidine A (3), spiramidine B (4) and deacetylspiramine F (5) were isolated from the aerial parts of Spirae japonica L. f. var ovalifolia. Their structures were charaterized mainly based on spectral analysis.
基金This work was financially supported by the National Natural Science Foundation of China (NSFC) for outstanding young scientists to X. J. Hao (No. 39525025) which is gratefully acknowledged. All spectra were recorded by the analytical group of the Stat
文摘A new diterpenoid, 15-O-acetylspiraminol (1), was isolated from the aerial parts of Spireae japonica L. f. var. ovalifolia. The structure was charaterized mainly based on spectral analysis.
基金This research was financially supported by the National NatUral Science Foundation of China
文摘Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 was carried out on the basis of 1D and 2D NMR spectra.
基金financially supported by the National Foundation for Outstanding Young Scientists to X.J.Hao(No.39525025).
文摘Chemical investigation on the ethanol extract from the roots of Spiraea japonica var. acuta resulted in the isolation of two new diterpene alkaloids named spiratines A and B (1-2), respectively.
文摘Abstract: Two new hetisine-type C20-diterpenoid alkaloids named spiraqine (1) and 6-hydroxylspiraqine (2), and four known alkaloids, namely spiredine (3), spiradine A (4), spiradine B (5), and spirasine V/VI (6), were isolated from Spiraea japonica L. f. var. fortunei(Planchon) Rehd. The structures of the alkaloids were elucidated using nuclear magnetic resonance analysis (1H-NMR, 13C-NMR, DEPT, HMQC, and HMBC) and mass spectrometry data.
