can't read?
Dithiothreitol (DTT) is the common name for a small-molecule redox reagent also known as Cleland's reagent.
D 2385 (OTTO) Dithiothreitol, for molecular biology, 99% Cas 3483-12-3 - used as an oxidizing agent. Its principal advantage is that effectively no mixed-disulfide species are populated, in contrast to other agents such as glutathione.