Showing papers by "Jiangong Shi published in 2002"

Studies on the chemical constituents of Coeloglossum viride (L.) Hartm. var. bracteatum (Willd.) Richter

Abstract: Aim To study the chemical constituents of the rhizomes of Coeloglossum viride (L.) Hartm. var. bracteatum (Willd.) Richter. Methods The compounds were mainly isolated with normal phase and reverse phase column chromatographic methods and HPLC. Their structures were elucidated on the basis of physical constants and spectral analysis (UV, IR, EI-MS, positive and negative FAB-MS, APCI-MS, 1HNMR, 13CNMR, DEPT, 1H-1H COSY, HMQC and HMBC). Results Eight compounds were obtained from the ethanolic extract of the rhizomes of this plant, dactylorhin B (I), loroglossin (II), dactylorhin A (III), militarine (IV), coelovirin A (V), gastrodin (VI), thymidine (VII) and quercetin-3,7-di-O-beta-D-glucopyranoside (VIII). Conclusion All the compounds were obtained from this plant and genus Coeloglossum for the first time. V named coelovirin A, is a new compound.

Studies on chemical constituents from Tibetan medicine wangla(rhizome of Coeloglossum viride var. bracteatum)

Abstract: Objective To study the chemical constituents of Tibetan Madicine Wangla. Method Sepearing the chemical constituents by means of chromatography and identifying their structures on the basis of MS and NMR spectra and TLC with authentic samples. Result Eight compounds were isolated as 4-[(4-hydroxyphenyl) methoxy]benzenemethanol(I), 4,4'-dihydroxydiphenyl methane(II), 4,4'-dihydroxydibenzyl ether(III), gastrodin(IV), 4-hydroxy benzenemethanol(V), 4-hydroxybenz aldehyde(VI), beta-sitosterol(VII) and beta-daucosterol(VIII). Conclusion All the compounds were obtained from genus Coeloglassum for the first time. The compound I is a new natural product.