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Table 2 Radical Scavenging activity 50 values (μg) of the methanol extracts and compounds from the leaves of H. Lanceolatum and P. aurantiacum

From: Antimicrobial and antioxidant activities of the extracts and compounds from the leaves of Psorospermum aurantiacum Engl. and Hypericum lanceolatum Lam.

Test substance Rsa50 (μg)
H. lanceolatum extract 30.99 ± 0.87e P.
aurantiacum extract 6.35 ± 0.10b,c
Isogarcinol 1.01 ± 0.24b
1,3,6-trihydroxyxanthone 4.73 ± 0.80b
Kenganthranol B 21.93 ± 5.98d
2,2’,5,6’-tetrahydroxybenzophenone na
Physcion na
1,8-dihydroxy-3-geranyloxy-6-methylanthraquinone na
Vismiaquinone na
L-ascorbic acid 0.089 ± 0.05a
  1. Values with the same letter superscripts are not significantly different using Waller Duncan test at p ≤ 0.05. na: not active.