Structure elucidation and complete NMR spectral assignments of four new diterpenoids from Smallantus sonchifolius.
Four new diterpenoids, named smaditerpenic acid A-D, together with five known compounds, were isolated from the H(2)O extract of the leaves of Smallantus sonchifolius (yacon) cultivated in Liaoning, China and their structures were elucidated on the basis of one- and two-dimensional NMR (including (1)H, (13)C-NMR, (1)H-(1)H COSY, HSQC, TOCSY, HMBC, and ROESY), electrospray ionization mass spectrometry (ESI-MS), and chemical methods.
Dou
De-Qiang
DQ
College of Pharmacy, Liaoning University of Traditional Chinese Medicine, DD Port, Dalian 116600, China. doudeqiang2003@yahoo.com.cn
Tian
Fang
F
Qiu
Ying-Kun
YK
Kang
Ting-Guo
TG
Dong
Feng
F
D019659:Asteraceae / Q000737:chemistry* / Q000254:growth & development; D002681:China; D004224:Diterpenes / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
D004224:Diterpenes