The Efficacy Study on Si Ni San Freeze-Dried Powder on Sleep Phase in Insomniac and Normal Rats

Table 1

The contents of five marker constituents in Si-Ni-San (freeze-dried powder) determined by 3D-HPLC.

Compound	Paeoniflorin	Naringin	Hesperidin	Licorice acid
Contents^a  (mg/g)	507.4 ± 0.03	167.5 ± 0.01	135.1 ± 0.02	136.6 ± 0.02

^aData expressed as mean ± SD (𝑛 = 4).