The sample of EH of Luxi county of Yunnan province was purchased from the medicinal materials market of Fuzhou city of China and was identified by Professor Chengzi Yang from the Fujian University of Traditional Chinese Medicine according to the monograph in the Pharmacopeia of the People's Republic of China.
Choline chloride (Chcl) (>99%), betaine hydrochloride (>99%), urea (>99%), citric acid (>99%), ethanediol (>99%), oxalic acid and xylitol(>99%) were purchased from Aladdin Chemical Reagent (Shanghai, China). Propylene glycol (>99%), glycerine (>97%), acetamide, lactic acid (>97%), glucose(>99%), sucrose were obtained from Sinopharm Chemical Reagent (Shanghai, China). Polyethylene glycol 200 was purchased form Yuanye Biotechnology (Shanghai, China). Butanediol (>99%) were purchased from Xilong Scientific (Guangzhou, China). levulinic acid (>99%) was obtained from Shanghai Lynn Technology Development (Shanghai, China).
The reference compound scutellarin was purchased from National Institutes for Food and Drug Control (Beijing, China).
Choline chloride (Chcl) (>99%), betaine hydrochloride (>99%), urea (>99%), citric acid (>99%), ethanediol (>99%), oxalic acid and xylitol(>99%) were purchased from Aladdin Chemical Reagent (Shanghai, China). Propylene glycol (>99%), glycerine (>97%), acetamide, lactic acid (>97%), glucose(>99%), sucrose were obtained from Sinopharm Chemical Reagent (Shanghai, China). Polyethylene glycol 200 was purchased form Yuanye Biotechnology (Shanghai, China). Butanediol (>99%) were purchased from Xilong Scientific (Guangzhou, China). levulinic acid (>99%) was obtained from Shanghai Lynn Technology Development (Shanghai, China).
The reference compound scutellarin was purchased from National Institutes for Food and Drug Control (Beijing, China).