Two new eremophilanolides from Xanthium sibiricum.
Two new eremophilanolides, sibiriolides A (1) and B (2), were isolated from the aerial parts of Xanthium sibiricum. The structures of the new compounds were identified as 4S,5R,7R,8R, 11R-2-oxo-1(10)-eremophilen-12,8-olide (1) and 4S,5R,7R,8R,11S-2-oxo-1(10)-eremophilen-12,8-olide (2) by HREIMS and NMR spectroscopic techniques in combination with X-ray crystallographic analysis and CD measurements.
Zhang
Xiao-Qi
XQ
Institute of Traditional Chinese Medicine & Natural Products, Jinan University, Guangzhou 510632, PR China.
Ye
Wen-Cai
WC
Jiang
Ren-Wang
RW
Yin
Zhi-Qi
ZQ
Zhao
Shou-Xun
SX
Mak
Thomas C W
TC
Yao
Xin-Sheng
XS
D002681:China; D018360:Crystallography, X-Ray; D007783:Lactones / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D035261:Plant Components, Aerial / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D031210:Xanthium / Q000737:chemistry*
D007783:Lactones; D010936:Plant Extracts; D012717:Sesquiterpenes