Table 1.

Detailed information of eight marker compounds obtained from OPLS-DA S-plot in Chuanxiong fractions

Marker compounds	tR (min)–m/z	Ions	VIP	Formula (neutral form)	Identification
a*	7.07–193	[M+H]+	16.09	C12H16O2	Senkyunolide A
b*	12.90–783	[2M+Na]+	15.41	C24H28O4	Ligustilide dimer
c*	12.52–191	[M+H-ligustilide]+	13.97	C24H28O4	Ligustilide dimer
d*	8.22–191	[M+H]+	13.52	C12H14O2	Z-Ligustilide
e*	7.77–191	[M+H]+	12.19	C12H14O2	Ligustilide isomer
f*	8.12–177	[M+H-H2O]+	12.10	C10H10O4	Ferulic acid
g*	4.05–207	[M+H-H2O]+	8.00	C12H16O4	Senkyunolide I
h#	3.45–499	[M+H-H2O]+	14.17	C25H24O12	Isochlorogenic acid A

* Represents the marker screened from M_THR

^#Represents the marker screened from M_FXa