Hydroquinine is an organic compound and as a cinchona alkaloid closely related to quinine.

NN-Dimethyl-p-phenylenediamine (DPD DMPD) is an aromatic amine mainly used as an intermediate to produce dyes.

Lidamidine is an effective antidiarrheal agent that inhibits intestinal secretion, reduces intestinal transit, and inhibits smooth muscle contraction.