Table 1.

Biological activities of nemertean pyridyl alkaloids (data from [41]).

Compound	Barnacle Larvae Settlement Inhibition IC50 (μM)	Barnacle Larvae Median Lethal Concentration IL50 (μM)	Crayfish Acute Paralytic Dose PD50 (μg)
2,3′-bipyridyl	4.1 (3.2–5.3) a	1.9 (1.0–4.3)	0.88 (0.71–1.1)
Anabaseine	1.2 (0.91–1.7)	2	3.6 (3.1–4.1)
Nemertelline	3.2 (1.8–6.0)	-	>120
Anabasine	3.0 (1.5–4.9)	-	3.9 (3.4–4.5)

^a Parentheses indicate standard deviations.