Ac-Gly-Ala-Lys(Ac)-AMC is a fluorogenic substrate for the determination of protease activity. Ac-Gly-Ala-Lys(Ac)-AMC undergoes hydrolysis and releases the fluorescent product 7-amino-4-methylcoumarin (AMC). AMC is fluorescent under UV light and can emit a fluorescent signal.

2-(2-bromophenyl)-5-chloro-4H-3,1-benzoxazin-4-one is an human neutrophil elastase inhibitor.

Methyl purple is an introduced quinone-imide redox dye that has been shown to be an exceptionally sensitive monitor of photosystem I activity in chloroplasts.