Abstract
Euchresta japonica, Platycodon grandiflorum, Belamcanda chinensis, and Adenophora tetraphylla are the four medicinal substances that make up the Lianjie Liyan compound mixture, a type of compound preparation for treating throat diseases such as pharyngitis and laryngeal carcinoma. The preparation has been used clinically for a long time and has been proven that it has curative properties in terms of alleviating pain and other symptoms. However, no quality control research on this preparation has been done yet. The pharmacological components in the main quality control standards, including Oxymatrine, matrine, N-methylcytisine, platycoside-D in Platycodon grandiflorum, and irisaxanthin in Shegan, were analyzed to further standardize the clinically rational use of this preparation and prevent the occurrence of adverse reactions and side effects. In this study, the five active components in the mixture were determined concurrently for the first time with the help of Box-Behnken design and response surface approach. The properties of established model showed excellent resolution and sensitivity, good reproducibility and speed, and accurate prediction thanks to the optimization of HPLC measurement conditions. The established approach was precise and trustworthy, and it offered helpful support and references for the construction of the Lianjie Liyan compound mixture as well as for the quality control.
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