Desethyl chloroquine (diphosphate) (Standard) is the analytical standard of Desethyl chloroquine (diphosphate). This product is intended for research and analytical applications. Desethyl chloroquine diphosphate is a major desethyl metabolite of Chloroquine. Chloroquine diphosphate is an inhibitor of autophagy and toll-like receptors (TLRs). Desethyl chloroquine diphosphate possesses antiplasmodic activity[1][2].