Chemical constituents of Carthamus tinctorius / 中草药

ABSTRACT

Objective: To investigate the chemical constituents of Carthamus tinctorius. Methods: Compounds were isolated by a combination of various column chromatography over silica gel, Sephadex LH-20, and pre-HPLC and their structures were identified by spectral analytical methods of MS and NMR and/or comparison with literature data. Results: Twenty compounds were isolated from the ethanol extract of C. tinctorius. Their structures were identified as kaempferol-3-O-β-D-glucosyl-(1→2)-β-D-glucoside (1), scutellarein (2), hexacosanoic acid (3), (2S)-1-O-heptatriacontanoyl glycerol (4), 4,4-dimethyl heptanedioic (5), 5,7,4'-trihydroxy-6- methoxyflavone-3-O-β-D-rutinoside (6), n-tetratriacont-20,23-dienoic acid (7), vanillic acid (8), gallic acid (9), tetrephthalic acid mono-[2-(4-carboxy-phenoxycarbonyl)-vinyl] ester (10), esculetin (11), 6-hydroxyapigenin-6-O-β-D-glucoside-7-O-β-D-glucuronide (12), quercetin-3,7-di-O-β-D-glucoside (13), 6-methoxykaempferol (14), syringing (15), E-1-(4'-hydroxypheny)-but-1-en-3-one (16), ursolic acid (17), 1-hexadecanoyl propan-2,3-diol (18), citrostadienol (19), and scopoletin (20). Conclusion: Compounds 1, 5, 7, 10, 18, and 19 are isolated from the plants of Carthamus L. for the first time, and compounds 2-4, 6, 8, 9, 11, 17, and 20 are obtained from C. tinctorius for the first time.