Analysis of volatile constituents from Anemarrhena asphodeloides by GC-MS / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of the volatile oil from the rhizome of Anemarrhena asphodeloides.</p><p><b>METHOD</b>The volatile oil was steam distillation. Chemical constituents were separated and analyzed by GC-MS. The relative content of each component was determined by area nomalization.</p><p><b>RESULT</b>24 volatile compounds were isolated and identified for the first time, representing 70.83% of the total oil.</p><p><b>CONCLUSION</b>The main constituents of this oil were aldehydes (31.15%), terpene and their oxide (20.66%), alkyls (8.35%), Furan heterocyclic compounds (6.41%), non terpene alcohol (4.26%). There are 12 compounds with contents over 3%. Among them, borneol has the highest content (9.35%).</p>

Studies on the chemical constituents in root of Gentiana macrophylla from Shaanxi / 中国中药杂志

<p><b>OBJECTIVE</b>To in vestigate the constituents in root of Gentiana macrophylla.</p><p><b>METHOD</b>Various column chromatographic techniques were used for isolation and purification of the principles. The structures were elucidated on the basis of spectral data (UV, IR, MS, 1H-, 13C-NMR etc.) and identified by comparing with standard substance.</p><p><b>RESULT</b>Eight compounds were identified. Four compounds isolated from the chloroform fraction are: 5-carboxyl-3,4-dihydrogen-1H-2-benzopyran-1-one (1), erythrocentauric acid (2), roburic acid (3), oleanolic acid (4). Water fraction gave four known secoiridoid glucosides. They were: gentiopicroside (5), swertiamarine (6), sweroside (7), 6'-O-beta-D-glucosylgentiopicroside (8).</p><p><b>CONCLUSION</b>1 is a novel compound. It was named as erythrocentauric acid. 2 was isolated from genus Gentiana and 8 was isolated from G. macrophylla for the first time.</p>