Cefuracetime is an impurity of Cefuroxime, which is an antibacterial agent.

Cimemoxin (INN), or cyclohexylmethylhydrazine, is a hydrazine monoamine oxidase inhibitor and antidepressant which was never marketed. Currently, Cimemoxin used as a reagent in organic synthesis.

Clofenciclan is a dopamine-releasing agent, developed by Boehringer & Soehne in the 1950s for the treatment of Parkinson's disease. Compared to other anti-parkinsonian drugs of the time, clofenciclan lacked peripheral anticholinergic properties and caused pronounced stimulation of the central nervous system.

Carbazeran is a potent PDE-II and PDE-III inhibitor. Potently inhibits cAMP hydrolysis. Shows chronotropic and inotropic effect in vivo (EC50 = 100 μM, ionotropic effects, independent of adrenergic mechanisms). Carbazeran is a potent cardiac stimulant. Phosphodiesterase inhibition and elevation of intracellular cyclic AMP concentration may be involved, at least in part, in carbazeran`s cardiac effect.

Toliodium is a surfactant used as an antibacterial and antiseptic agent. Also, it was used as an animal food additive.

Verilopam is a potent analgesic.

Diathymosulfone is an antibacterial agent. It was used as antimycobacterial and leprostatic drug.

Diacetamate (Acetaminophen Acetate, Acetaminophen Impurity, diacetyl-p-aminophenol) is a acetaminophen synthetic impurity. Acetaminophen-aspirin mixtures have lower stability due to acetylation of the former by the latter, producing diacetyl-p-aminophenol.

Diampromide is a synthetic narcotic analgesic. It was designed as a methadone analog and hence with a chiral center similar to that of the parent. Diampromide approximates to the potency of pethidine and morphine in mice and rats, respectively. It has been evaluated in postoperative pain. Diampromide is not found in any pharmaceutical preparations sold in the United States. It is under international control according to the UN Single Convention 1961 and its amendments, Schedule I.