The major human metabolite a bile acid which inhibits radioligand binding to muscarinic M1 but not to M2 or M3 receptors.

2-Chloro-1, 4-naphthoquinone is a substituted naphthoquinone which is used as an insecticide and acaricide.

H-Val-Pro-Pro-OH(TFA), a proline peptide derivative from milk, is an ACE inhibitor with IC50 of 9 M.