期刊
PHYTOCHEMICAL ANALYSIS
卷 15, 期 5, 页码 275-279出版社
WILEY
DOI: 10.1002/pca.761
关键词
C-13-NMR; essential oil composition; heat-sensitive compound; ascaridole; isoascaridole; Chenopodium ambrosioides; Madagascar
commercial sample of the essential oil of Chenopodium ambrosioides L. from Madagascar was analysed by GC, GC-MS and C-13-NMR. By GC analysis, the major constituents were found to be ascaridole (1) (41.8%), isoascaridole (2) (18.1%), p-cymene (16.2%), alpha-terpinene (9.7%) and limonene (3.8%). However, ascaridole undergoes a partial thermal isomerisation to 2 and hence the amount of 1 is under-estimated by GC analysis. The actual contents of 1 and 2 (55.3 and 4.6%, respectively) were obtained following combined analysis of the sample by GC and C-NMR. Several hydroxy- and polyhydroxy-menthanes were identified by C-13-NMR. Copyright (C) 2004 John Wiley Sons, Ltd.
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