4-Methylumbelliferyl-α-D-Glucopyranoside (4-Methylumbelliferyl-α-D-Glucose) is a fluorescent substrate for α-glucosidase, which releases the fluorescent moiety 4-methylumbelliferyl (4-MU) upon cleavage. 4-MU has pH-dependent fluorescence excitation activity, with excitation wavelengths of 320 nm at low pH (1.97-6.72) and 360 nm at high pH (7.12-10.3), respectively. The emission wavelength of 4-Methylumbelliferyl-α-D-Glucopyranoside increases with decreasing pH, ranging from 445-455 nm. 4-Methylumbelliferyl-α-D-Glucopyranoside can be used as a biomarker for Fabry and Pompe diseases to quantify α-glucosidase activity in infant blood spot samples.

PF-4840154 is a potent, selective agonist of the rat and human TrpA1 channel and elicited TrpA1-mediated nocifensive behaviour in mouse, with EC50 of 97 nM and 23 nM for rTrpA1 and hTrpA1, respectively.

Chiniofon, a halogenated 8-hydroxyquinoline, is used as an antiamebic drug. This type of anti-amebic drug exerts an anti-amebic effect by inhibiting intestinal commensal bacteria and affects amoebic dysentery, but has no effect on extra-intestinal amoebic parasites.