Furbucillin is a synthetic antibacterial agent that has never been marketed. Information about the current use of this drug is not available.

Monophosphothiamine is thiamine derivative used for the treatment of neuritis, polyneuritis, asthenic conditions (weakness), as an additional remedy for chronic blood circulation insufficiency, chronic gastritis accompanied by motor and secretory disorders functions of the stomach. Monophosphothiamine underwent metabolic phosphorylation to active metabolite thiamine pyrophosphate, that acts as a coenzyme in the different metabolic process.

Bifenthrin is a pyrethroid insecticide used in urban and agricultural applications. Bifenthrin is a broad-spectrum insecticide that modifies voltage-gated ion channels disrupting the normal function of nerve cells. In May 2010 EU Commission withdrawn plant protection products containing bifenthrin.

Camptothecin-20(S)-O-propionate (CZ48) is a prodrug of camptothecin, an alkaloid isolated from the Chinese tree Camptotheca acuminata, with potential antineoplastic activity. Upon entry into cells, camptothecin-20(S)-O-propionate is hydrolyzed by esterases into the active form camptothecin. Camptothecin selectively stabilizes topoisomerase I-DNA covalent complexes, thereby inhibiting religation of topoisomerase I-mediated single-strand DNA breaks and producing potentially lethal double-strand DNA breaks when encountered by the DNA replication machinery. CZ48 is being investigated in clinical trials for the treatment of advanced solid tumors and lymphomas.

Telenzepine is a selective muscarinic M1 receptor antagonist that was studied for selective inhibition of gastric acid secretion. Telenzepine was used in clinical trials in patients with acute duodenal ulcer, where was found that once daily administration of 3 mg in the evening must be regarded as the optimal dosage regimen of telenzepine. However, the preregistration for peptic ulcer in Germany was discontinued. In addition, the drug was studied in patients with nocturnal asthma. It was shown that telenzepine via the oral route at a dose of up to 5 mg was not effective in preventing nocturnal asthma.

LY2608204 is a activator of glucokinase (GK) with EC50 of 42 nM. Eli Lilly is developing LY 2608204 as an orally administered, once-daily therapy for type 2 diabetes. LY-2608204 is in phase I clinical trials for the treatment of type 2 diabetes.

Bleomycin A6 (also known as boanmycin) was developed in China as an antineoplastic antibiotic. This drug participated in clinical trials for the treatment of Squamous Cell Lung Cancer. It was shown that besides the antitumor effect, Bleomycin A6 had the ability to alter the tumor microenvironment and could contribute toward lung cancer relapse and metastasis on long-term treatment. The development of this drug, apparently, was discontinued.