Table 1.

The concentration of serotonin in the samples with the analysed substances and in the control samples.

N	Sample	Average Serotonin Concentration (ng/mL)	Standard Deviation
12	Control	11.44	7.42
12	Parthenolide	5.90	2.11
9	Izospiciformin	0.23	0.19
12	Stizolin	4.72	1.36
12	Stizolicin	6.62	1.08
12	Methanol extract from the S. balsamita leaves	3.48	2.21

N = number of valid results.