Structure elucidation and complete NMR spectral assignments of two new oleanane-type pentacyclic triterpenoid saponins from the husks of Xanthoceras sorbifolia Bunge.
Two new saponins were isolated from husks of Xanthoceras sorbifolia Bunge and their structures were elucidated as 3-O-[beta-D-galactopyranosyl(1-->2)]-alpha-L-arabinofuranosyl(1-->3)-beta-D-methyl glucuronic acid-21-O-(3,4-diangeloyl)-alpha-L-rhamnose-3beta, 16alpha, 21beta, 22alpha, 28beta-pentahydroxyl-22-acetoxy-olean-12-ene(1) and 3-O-[beta-D-galactopyranosyl(1-->2)]-alpha-L-arabinofuranosyl(1-->3)-beta-D-methyl glucuronic acid-21,22-O-diangeloyl-3beta,15alpha,16alpha,21beta,22alpha,28beta-hexahydroxyl-olean-12-ene(2) on the basis of 1D and 2D NMR (including (1)H, (13)C-NMR, (1)H-(1)H COSY, HSQC, HMBC and DEPT), ESI-MS spectrometry and chemical methods.
Guo
Ying
Y
College of Pharmacy, Liaoning University of Traditional Chinese Medicine, 77 Life one Road, DD Port, Dalian 116600, China.
Dou
De-Qiang
DQ
Kang
Ting-Guo
TG
Wang
Shi-Cheng
SC
Kuang
Hai-Xue
HX
D009682:Magnetic Resonance Spectroscopy; D009828:Oleanolic Acid / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D029631:Sapindaceae / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry*
D010936:Plant Extracts; D012503:Saponins; D009828:Oleanolic Acid