Bioassay Directed Isolation and Biological Evaluation of Compounds Isolated from Rubus fairholmianus Gard.

Table 1

DPPH and ABTS radical scavenging activities of fractions and compounds of R. fairholmianus.

Fractions; and compounds	DPPH radical; scavenging activity; (IC50: µg/mL)	ABTS radical cation; scavenging activity; (µM Trolox equivalents/g extract)
1	14.73	2240.99 ± 32.55
2	17.95	1363.49 ± 23.38
3	18.70	3749.60 ± 5.85
4	20.31	3074.61 ± 35.56
5	7.16	3496.48 ± 51.96
6	18.01	4478.60 ± 35.56
7	9.55	3374.98 ± 23.38
8	25.56	2335.49 ± 40.92
9	3.61	4650.72 ± 15.47
10	15.36	4377.35 ± 11.69
11	21.97	2234.24 ± 5.85
12	17.61	2122.86 ± 32.55
13	27.79	1140.74 ± 30.93
14	24.63	4765.47 ± 47.85
15	16.39	4974.72 ± 45.66
16	13.41	3860.98 ± 42.15
Compound 1	3.23	5344.45 ± 24.94
Compound 2	5.09	9233.20 ± 54.32^a
Compound 3	10.76	6421.23 ± 84.46^d
Compound 4	8.57	8754.78 ± 42.29^b
Compound 5	12.35	5656.32 ± 38.53
Compound 6	9.43	7455.54 ± 62.98^c
Butylated hydroxy toluene (BHT)	13.18	—
Butylated hydroxy anisole (BHA)	4.88	—
Rutin	5.81	—
Quercetin	4.12	—

Values are mean of triplicate determination   ±  standard deviation. Statistically significant at where a > b > c > d.