Malachite green oxalate is a triphenylmethane dye which can be used to detect the release of phosphate in enzymatic reactions.

Methoxy-X04, a derivative of Congo red and Chrysamine-G, is a brain-permeable fluorescent probe for amyloid-β (Aβ).

DL-α-Hydroxyglutaric acid disodium salt is an α -hydroxyacid formed from the hydrolysis of (R) -5-oxy-2-tetrahydrofuran carboxylic acid, which is overproduced in human neurometabolic disease D-α -hydroxyglutaric uria. ?