Abstract
In this paper, the isolation, purification and quantification of ginsenoside F5 and F3 isomeric compounds from crude extracts of flower buds of Panax ginseng (CEFBPG) was investigated by reversed-phase high-performance liquid chromatography (RP-HPLC) for the first time. The satisfied separation at analytical scale was achieved using a Zorbax Eclipse XDB C-18 column with a ternary mobile phase of acetonitrile–water–phosphoric acid (28:71:1) at a flow rate of 1.0 mL/min within 40 min. UV detection was set at 203 nm. Ginsenoside F5 and F3 was 4.21 mg and 5.13 mg in 1 g flower buds of P. ginseng (FBPG), respectively. The preparation of ginsenoside F5 and F3 at semi-preparative scale was performed by using a Daisogel C-18 column and gradient elution system of acetonitrile–water (32:68 → 28:72) at a flow rate of 10 mL/min with a sample load of 20–30 mg, and yielded ginsenosides in purity of more than 96%. Their structures were characterized by NMR and high resolution electrospray ionization mass spectrometry (HRESIMS). All the method validations showed acceptable limits. The results indicate a new source to obtain ginsenoside F5 and F3, and show that the method developed here appears to be reliable for simultaneously preparing them from CEFBPG.
Highlights
IntroductionActive constituents have been pursued extensively from the different parts of Panax ginseng (PG) including roots, stems, leaves, berries and flowers, and many dammarane-type triterpene oligoglycosides have been identified as the principal ingredients [7,8,9]
We developed a specific reversed-phase high-performance liquid chromatography (RP-HPLC)/UV method to prepare preparepure highly pure ginsenoside and determined contents
A simple and reliable RP-HPLC method has been developed for the separation and quantification of two isomeric compounds ginsenoside F5 and F3 in flower buds of P. ginseng (FBPG) for the first time
Summary
Active constituents have been pursued extensively from the different parts of PG including roots, stems, leaves, berries and flowers, and many dammarane-type triterpene oligoglycosides have been identified as the principal ingredients [7,8,9]. The saponins in the flower buds of P. ginseng (FBPG) have been reported including various dammarane-type saponins, the same as in ginsenoside roots, even several new active compounds [10,11,12]. Ginseng flowers has been recorded to strengthen body, tonify Qi, and delay the process of aging in many Chinese medical literatures such as “Zhong Hua Ben Cao” and “Chinese
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