α-Conotoxin Im-I is a selective α7/α9 nAChR antagonist, blocking α7 nicotinic receptors with the highest apparent affinity, while having an 8-fold lower affinity for homomeric α9 nicotinic receptors. α-Conotoxin Im-I is toxic and induces seizures in rodents. α-Conotoxin Im-I is a tool for studying neuronal nAChR.

Filorexant is an orally bioavailable effective and selective reversible antagonist of OX1 and OX2 receptor with (Ki <3 nM).

8-hydroxyguanosine (8-OHG) is a marker for measuring the rate of oxidative damage to nucleic acids and lipids.The concentration of 8-OHG in CSF in Parkinson's disease (PD) patients is approximately three-fold that in controls. The concentration of 8-OHG in CSF decreased significantly with the duration of disease. However, the concentration of 8-OHG in serum was not significantly altered in PD patients compared to that in controls.