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GC-MS metabolic profiling of the apolar and polar fractions from methanolic  extracts of Haberlea rhodopensis revealed more than one hundred compounds  (amino acids, fatty acids, phenolic acids, sterols, glycerides, saccharides,  etc.). Bioactivity assays showed that the polar fractions possessed strong  free radical scavenging activity (IC50 - 19.95 ±14.11 μg ml-1 for fresh  leaves and 50.04 ±23.16 μg ml-1 for desiccated leaves), while both the polar  and apolar fractions failed to provoke any significant cytotoxic effects  against the tested cell lines. Five compounds possessing antiradical activity  were identified - syringic, vanillic, caffeic, dihydrocaffeic and p-coumaric  acids.

GC-MS profiling of bioactive extracts from Haberlea rhodopensis: An endemic resurrection plant