Table 2.

The calibration curves, linearity range, and LLOQ of five compounds (n = 6)

Compounds	Regression equation	r	Linearity range	LLOQ (ng/ml)
Nunciferine	Y = 0.0832X + 0.109	0.9938	1–1000	1
O-nornuciferin	Y = 0.0134X + 0.00413	0.9983	0.5–500	0.5
Liriodenine	Y = 0.0602X + 0.0398	0.9971	0.5–500	0.5
Armepavine	Y = 0.0294X + 0.00217	0.9918	0.5–500	0.5
Pronuciferine	Y = 0.0306X + 0.0347	0.9942	1–1000	1

LLOQ, lower limit of quantification.