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Methanol extract of the flowering aerial parts of  Hypericum sinaicum  Boiss. (ME) growing in Saint Catherine Protectorate (SKP), Egypt was analysed for its phenolic compounds profiling using HPLC and colorimetric methods. The total phenol content of ME was 158.60 ± 0.74 (μg GAE/mg D.E.), while the total flavonoid content was 70.91 ± 0.01 (μg QE/mg D.E.). HPLC analysis revealed that the highest flavonoid was naringenin (50.31 mg/g), while the highest phenolic acid was syringic acid (0.37 mg/g). The scavenging activity of ME was evaluated using DPPH assay with SC 50  22.9 μg/ml and ABTS with SC 50  13.10 μg/ml. ME produced dose - dependent and significant inhibition of edema at 4 hour of dose 200 mg/kg (78.55%) and 100 mg/kg (72.89%) to that of standard drug Indomethacin (86.94%). The current study interprets the anti-inflammatory and antioxidant potency of  H. sinaicum .

Antiinflammatory and antioxidant activity of Hypericum sinaicum Boiss. growing widely in Egypt