TABLE 3.

% ANTIOXIDANT ACTIVITY OF THE COMPOUNDS

Concentration in μg/ml	200	100	50
L-ascorbic acid	99.2	99	98.8
6a	95.3	95.3	91.9
6b	100	98.3	88.1
6d	94.6	80.2	28.7
6g	57.9	48.0	28.2
6h	98.1	91	89.8
6o	97.9	94	85.7
6p	100	97.2	93.6
6r	94.2	93.2	92.6