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  Indian J Med Microbiol
 

Figure 1: HPLC chromatogram and chemical structure of free-B-ring flavonoid (baicalin) and flavan (catechin). The flavonoids were detected using a UV detector at 275 nm and identified based on retention time by comparison with known flavonoid standards

Figure 1: HPLC chromatogram and chemical structure of free-B-ring flavonoid (baicalin) and flavan (catechin). The flavonoids were detected using a UV detector at 275 nm and identified based on retention time by comparison with known flavonoid standards