Interrelationship between secondary metabolites and antioxidant capacities of Centella asiatica using bivariate and multivariate correlation analyses

Applied Biological Chemistry

Table 4 Pearson’s correlation coefficients (r) for the relationship between secondary metabolite contents of C. asiatica extracts and their antioxidant capacities

Parameter	ABTS	DPPH	FRAP
Madecassoside	0.793^**	0.750^**	0.832^**
Asiaticoside	0.853^**	0.777^**	0.882^**
Madecassic acid	− 0.304	− 0.454	− 0.380
Asiatic acid	− 0.304	− 0.389	− 0.370
Chlorogenic acid	0.721^**	0.744^**	0.765^**
Caffeic acid	− 0.049	0.018	− 0.116
3,4-Dicaffeoylquinic acid	0.085	0.274	0.208
1,5-Dicaffeoylquinic acid	0.528^*	0.606^*	0.607^*
Ellagic acid	0.714^**	0.776^**	0.754^**
Cynaroside	0.783^*	0.692	0.780^*
Scutellarin	0.834^**	0.728^**	0.849^**
Miquelianin	0.652^*	0.616^*	0.722^**

Pearson correlation coefficients were determined to confirm the bivariate correlation. The asterisks indicate significant differences between the bivariate correlations
*p < 0.05; **p < 0.01