LIN Yong-qiang, GUO Dong-xiao, JIAO Yang, et al. Isolation and Content Determination of Caffeoylquinic Acid Glucoside in Lonicerae Japonicae Caulis[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(16): 28-33.
LIN Yong-qiang, GUO Dong-xiao, JIAO Yang, et al. Isolation and Content Determination of Caffeoylquinic Acid Glucoside in Lonicerae Japonicae Caulis[J]. Chinese journal of experimental traditional medical formulae, 2018, 24(16): 28-33. DOI: 10.13422/j.cnki.syfjx.20181506.
Objective: To isolate and identify 5-O-(4'-O-glucosylcaffeoyl)quinic acid from Lonicerae Japonicae Caulis
and develop a high performance liquid chromatography (HPLC) method for its content determination. Method: 5-O-(4'-O-glucosylcaffeoyl)quinic acid was isolated from 50% methanol extract of Lonicerae Japonicae Caulis by chromatographic methods
and its structure was identified by nuclear magnetic resonance (NMR) spectrum and mass spectrum (MS) data. Dikma Technologies PLATISILTM ODS C18 column(4.6 mm×250 mm
5 μm)was used with a mobile phase consisting of acetonitrile(A)-0.4% acetic acid solution(B) for gradient elution (0-20 min
8%-15%A)at a flow rate of 1.0 mL·min-1. The detection wavelength was 327 nm and the column temperature was 35℃. Result: 5-O-(4'-O-glucosylcaffeoyl)quinic acid showed a good linear relationship with peak area in the range of 0.15-3.07 μg
with the linear regression equation of Y=1.521 3X-3.777 7(r=1.000 0);the test sample solution was stable within 24 h; the average recovery was 95.95% (RSD 1.5%
n=6). The content of 5-O-(4'-O-glucosylcaffeoyl)quinic acid in eight batches of samples was in the range of 1.737-7.390 mg·g-1. Conclusion: The 5-O-(4'-O-glucosylcaffeoyl)quinic acid was obtained from Lonicerae Japonicae Caulis for the first time. The complete NMR data of 5-O-(4'-O-glucosylcaffeoyl)quinic acid was presented in this paper for the first time
and the method for its content determination and content limits in Lonicerae Japonicae Caulis were established. The established method is accurate and reliable
which could be applied for the quality control of Lonicerae Japonicae Caulis.