RESUMO
Objective To qualitatively analyze the chemical constituents in rats after intragastric administration of estrogenically active ethanol extract of Cuscuta chinensis. Methods The high performance liquid chromatography quadrupole time-of-flight mass spectrometry (HPLC-Q/TOF MS/MS) was used to identify the prototypes and metabolites in rat urine. Results Twelve chemical constituents were identified in the drug-containing urine, including six prototypes and six metabolites. The prototypes are kaemoferol-3-β-D-glucuronide, 6-O-(E)-p-coumaroyl-β-D-fructofuranosyl-(2→1)-α-D-glucopyranoside, aempferol-7-rhamnoside, chlorogenic acid, and apigenin. The metabolites are p-hydroxycinnamic acid, p-hydroxyphenylpropionic acid, isorhamnetin, kaempferol-3-O-glucoside, acetyl caffeic acid, and quercetin sulfate. Conclusion The method of HPLC-Q/TOF MS/MS is simple and rapid for the analysis of prototype components and metabolites in rats urine after oral administration of ethanol extract of C. chinensis, providing the basis for further clarification of the estrogen material basis of C. chinensis.
RESUMO
OBJECTIVE:To establish a method for the simultaneous determination of andrographolide,quercetin-3-O-gluco-side,dehydroandrographolide and kaempferol-3-O-glucoside in Compound chuanxinlian tablet. METHODS:HPLC was performed on the column of Phenomenex C18 with mobile phase of acetonitrile- 0.1% phosphoric acid aqueous(gradient elution)at a flow rate of 1.0 ml/min,the detection wavelength was 225 nm for andrographolide,335 nm for quercetin-3-O-glucoside and 254 nm for de-hydroandrographolide and kaempferol-3-O-glucoside,column temperature was 25 ℃,and the volume injection was 10 μl. RE-SULTS:The linear range was 0.111-2.770 μg for andrographolide(r=0.999 9),0.064-1.605 μg for quercetin-3-O-glucoside (r=0.999 9),0.086-2.138 μg for dehydroandrographolide(r=0.999 9)and 0.050-1.260 μg for kaempferol-3-O-glucoside(r=0.999 9);the limits of quantitation were 0.48 ng,0.88 ng,0.93 ng and 1.03 ng,the limits of detection were 0.79 ng,1.15 ng,0.96 ng and 1.07 ng,respectively;RSDs of precision,stability and reproducibility tests were lower than 2.0%;recoveries were 96.57%-100.30%(RSD=1.3%,n=9),95.04%-98.87%(RSD=1.3%,n=9),95.74%-102.92%(RSD=2.4%,n=9) and 96.73%-100.95%(RSD=1.6%,n=9),respectively. CONCLUSIONS:The method is sensitive,reliable and reproducible,and can be used for the si-multaneous determination of andrographolide,quercetin-3-O-glucoside,dehydroandrographolide and kaempferol-3-O-glucoside in Compound chuanxinlian tablet.
RESUMO
Objective: To study the chemical constituents of the flowers of Impatiens balsamina L.. Methods: The compounds were isolated by chromatography and solvant extration and the structures were identified on the basis of spectral analysis. Results: Four compounds were isolated and identified as stigmasterol(1), kaempferol(2), Kaempferol 3 glucoside(3) and Kaempferol 3 glucosyl rhamnoside(4). Conclusions: All the compounds were isolated from the flowers which were cultured for the first time in China.