Table 1. Calibration curve and linearity of standards of triterpenes

Standard	Calibration curve	Linearity
Madecassoside	y=1.7768×+1.035	1.0000
Asiaticoside	y=1.8039×+26.28	1.0000
Madecassic acid	y=3.1555×−6.27	0.9995
Asiatic acid	y=2.5153×+10.135	0.9995