Two new monoterpene diglycosides, wincaloside A (1) and wincaloside B (2), along with loganin (3) were isolated from the stem barks of Winchia calophylla A. DC. The structures of 1 and 2 were established by spectroscopic and chemical methods.
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.
A novel dimeric coumarin (1), a dimeric of seselin named diseselin A, was isolated from the aerial part of Clausena lenis. The structure was elucidated based on the MS, 1D and 2D NMR data.
Hong Ping HEShun Ting CHENYue Mao SHENChang Xiang CHENYi Bin ZHAOXiao Jiang HAO
Three derivatives of micromelin, named hydramicromelins A-C (1-3), were isolated from the aerial part of Micromelum integerrimum (Buch.-Ham) Roem., respectively. Hydramicromelins A-C (1-3) were epimers which possessed the same plane structure and molecular formula. Their structures were elucidated based on MS and NMR data. The relative configurations of 1-3 were established by NOE analysis.
Hong Ping HEYun ZOUYue Mao SHENXiao Yan HAOGuo Yin ZUOXiao Jiang HAO
A new binary carbazole alkaloid, 8, 8-biskoenigine (1), along with its monomer, koenigine, was isolated from the dried leaves of Murraya koenigii collected in Xishuangbanna, Yunnan province. The structure of 1 was established by spectroscopic methods.
Yun Song WANGHong Ping HEXin HONGQing ZHAOXiao Jiang HAO
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.
Guo Ying ZUOHong Ping HEXin HONGWei Ming ZHUYi Ming HUXiao Sheng YANGXiao Jiang HAO
