Table 6.

IC₅₀, one-way ANOVA F-ratio and HSD values of BHT and compounds isolated from Bauhinia variegata L. stem bark in DPPH radical scavenging assay.

Parameter	BHT	BV1	BV3	BV4
IC50 (µg/mL)	76.16 ± 2.63	19.44 ± 0.58	4.46 ± 0.21	7.28 ± 1.64
F ratio (df = 9,20)	69.73 *	185.39 *	75.28 *	216.97 *
HSD	1.14	5.58	4.58	5.80

df = degree of freedom; * Significant at p ≤ 0.05.; IC₅₀ = 50% inhibition concentration, lower IC₅₀ means higher antioxidant activity; ANOVA = Analysis of variance; HSD = Honestly significant difference; BHT = butylated hydroxytoluene (standard reference compound); BV1 = kaempferol; BV3 = protocatechuic acid methyl ester; BV4=protocatechuic acid. Values are mean ± standard deviation, n = 3.