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Figure 2: High-performance liquid chromatography chromatograms of: (a) Sample from Vitosha mountain, (b) standard mixture of phenolic compounds at 280 nm. Key to peaks identified: protocatechic (1), chlorogenic (2), caffeic (3), ferulic (4) and p-coumaric (5) acids, and luteolin 7-O-glucoside (6), isoquercitrin (7), apigenin 7-O-glucoside (8), astragalin (9), isorhamnetin 3-O-glucoside (10), quercetin (11), luteolin (12) and kaempferol (13) |
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