Berberis sibirica was found to exhibit antioxidant potential.
Methanol and acetone:water (70:30 V/V) extracted the highest quant. of phenolics.
pH-zone HCCC chromatography in MtBE–H2O (1:1) purified phenolics from alkaloids.
UPLC–DAD-ESI-IT-Orbitrap technique identified 8 phenolic acids and 2 flavonoids.
Magnoflorine was identified in the extracts of B. sibirica for the first time.