Allomatrine is a natural product from Sophora alopecuroides L. Allomatrine when given i.c.v. may stimulate the descending dynorphinergic neuron resulting in the stimulation of KORs in the spinal cord.

Theaflavine-3, 3'-digallate and lactic acid together could reduce herpes simplex virus transmission.

β-Amyloid (1-42), rat TFA is a 42-aa peptide, shows the effects of cytotoxicity on acute hippocampal slices, and has been used in studies of alzheimer's disease.