Prosaikogenin F is a natural product with anticancer and hemolytic properties .

Eledoisin is a peptide extracted from the posterior salivary glands of certain small octopi (Eledone spp., Mollusca), or obtained by synthesis.?Its actions resemble those of SUBSTANCE P;?it is a potent vasodilator and increases capillary permeability.

Dynorphin B (1-9) is a neuropeptide and N-terminal cleavage product of dynorphin B. The formation of dynorphin B (1-9) is blocked by N-ethylmaleimide (NEM), a non-selective inhibitor of cysteine peptidases.