Table 4.

Heart rates of caged polyprenylated xanthones 1–11 in zebrafish embryos. Zebrafish embryos treated with embryo water were used as control and showed the heart rate: 21 per 10 s. The results shown are representative of three independent experiments.

Xanthone	Heart Rate (per 10 s)
	1 μM	2 μM	4 μM	8 μM	16 μM	32 μM
1	8	3	0
2	21	18	0
3		8	6	0
4		21	17	13
5		13	10	8
6				17	14	8
7				6	6	5
8		17	13	6
9		8	5	0
10	20	17	16	16
11	21	21	21	20