Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
Publication DOI: 10.1081/JLC-100100511Journal NLM ID: 9605507Publisher: Monticello, NY: Marcel Dekker
Institutions: Institute of Chinese Pharmaceutical Sciences, China Medical College, Taichung, Taiwan, China, National Laboratories of Foods and Drugs, Department of Health, Executive Yuan, Nankang, Taipei, Taiwan, China, Chung Hwa Institute of Technology, Jen-Teh Hsiang, Taiwan, China, Department and Institute of Pharmacology, National Yang-Ming University, Taipei, Taiwan, China
Tao-shang-tsao is the dried entire plant of Ixeris laevigata var. oldhami (Compositae) and a commonly used folk herb in Taiwan. To evaluate the quality of I. laevigata var. oldhami, a simple, rapid, and accurate high-performance liquid chromatographic (HPLC) method was developed for the assay of four flavonoids, apigenin, apigenin-7-O-glucoside, luteolin, and luteolin-7-O-glucoside, and two coumarins, esculetin and esculin. The present HPLC system uses an Inertsil ODS-2 column by gradient elution with acetonitrile and 0.1% (v/v) phosphoric acid as the mobile phase. Ethylparaben was used as an internal standard and detected at 254 nm. Regression equations revealed good linear relationships (correlation coefficients: 0.9998–0.9999) between the peak-area ratios of each constituent to ethylparaben. The relative standard deviations of these six constituents ranged between 0.56–3.04% (intra-day) and 0.79–4.39% (inter-day). The contents of six constituents of I. laevigata var. oldhami in 7 crude drugs have been determined. This study also compared their constituents with those of similar folk herbs, I. chinensis and Taraxacum formosanum, commonly used as an adulterant, by their HPLC chromatograms.
HPLC, coumarins, flavonoids, esculin, esculetin, Ixeris laevigata var. oldhami
Structure type: monomer
Location inside paper: p. 2578, Table 1
Trivial name: cosmosiin, apigenin 7-O-glucoside, rhoifolin, apigenin 7-glucoside, apigetrin
Compound class: glycoside, flavonoid glycoside, flavonol glycoside
Contained glycoepitopes: IEDB_142488,IEDB_146664,IEDB_613414,IEDB_983931,SB_192
Methods: HPLC, extraction
Related record ID(s): 66607, 66608
NCBI Taxonomy refs (TaxIDs): 190259Reference(s) to other database(s): CCSD:
50502, CBank-STR:1305
Show glycosyltransferases
There is only one chemically distinct structure:
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