Identification of compounds using HPLC-QTOF-MS online antioxidant activity mapping from aerial parts of Ligularia stenocephala

Applied Biological Chemistry

Table 3 DPPH radical scavenging activity of active components (1–6) from L. stenocephala

Compounds	DPPH radical scavenging activity (%)
Compounds	10 µM	30 µM	50 µM
1	22.6 ± 1.0^***	50.7 ± 0.5^***	75.0 ± 1.2^***
2	23.3 ± 1.0^***	63.3 ± 0.7^***	89.7 ± 0.2^***
3	7.1 ± 4.7	23.7 ± 0.8^***	37.0 ± 1.8^***
4	8.4 ± 0.2^**	24.5 ± 0.1^**	40.0 ± 2.8^***
5	6.6 ± 2.2	16.3 ± 2.2^**	25.4 ± 4.3^**
6	38.2 ± 0.7^***	67.5 ± 0.9^***	90.5 ± 0.5^***
l-Ascorbic acid	17.5 ± 0.7^**	50.3 ± 0.5^***	89.8 ± 2.7^**

l-Ascorbic acid was used as the positive control. The experiment was repeated thrice
^**p < 0.01, ^***p < 0.001