Letosteine (Viscotiol) is an orally active, effective, and safe expectorant that can be used in the study of acute or chronic respiratory diseases, for example, bronchopulmonary disease.

lsocryptomerin is a membrane-active antifungal compound that can be isolated from Selaginella tamariscina. lsocryptomerin can depolarize fungal plasma membrane. lsocryptomerin also shows anticancer and antibacterial activities.

Protein Kinase C (19-31) TFA, a peptide inhibitor of protein kinase C (PKC), derived from the pseudo-substrate regulatory domain of PKCa (residues 19-31) with a serine at position 25 replacing the wild-type alanine, is used as protein kinase C substrate peptide for testing the protein kinase C activity.