Damotepine is a derivative of thiepin, structurally related to doxepin. Damotepine was discovered by the Swiss pharmaceutical company Geigy A.G. and was evaluated in clinical trials for the treatment of anxiety in the early 1970s.

Nelezaprine is a skeletal muscle relaxant.

Mixidine is negative chronotropic agent patented by McNeil Laboratories. Mixidine produced a dose-related decrease in heart rate elevated reflexly by aminophylline, by beta-adrenergic stimulation induced by isoproterenol, by sympathetic nerve stimulation and by intravenous infusion of glucagon. Mixidineattenuated the increase in contractile force produced by sympathetic nerve stimulation but not that induced by isoproterenol. The compound antagonized the increase in the rate of isolated guinea-pig atria induced by both isoproterenol and histamine. In the conscious dog, Mixidine caused no decrease in resting heart rate, mean arterial pressure and cardiac output. It reduced atropine-induced sinus tachycardia as well as that induced by treadmill exercise.

Gamfexine (WIN 1344) was introduced in the literature in 1966 as an anti-depressant. Although it was reported to be effective in the treatment of withdrawal in schizophrenia, it worsened psychotic symptoms.

Cetocycline (formerly chelocardin or cetotetrine) is tetracycline derivative with potent antibacterial activity against a number of Gram-positive and Gram-negative multi-resistant pathogens. Cetocycline was found to be more active than tetracycline against many clinical isolates of aerobic gram-negative bacilli, but is less active against staphylococci, and has no activity against Pseudomonas. At low concentrations, like classical tetracyclines, chelocardin induces the proteomic signature for peptidyl transferase inhibition demonstrating that protein biosynthesis inhibition is the dominant physiological challenge. At higher concentrations B. subtilis mainly responds to membrane stress indicating that at clinically relevant concentrations the membrane is the main antibiotic target of chelocardin.

Suncillin is an antibacteria and antifungal agent produced in Phytera's laboratory from a cell culture of a plant. Suncillin was patented by Bristol-Myers Co. In 1968 for the Pseudomonas bacteria treatment but was never marketed.

Prodilidine is an arylpyrrolidine derivative patented by Mead Johnson & Co.as moderately potent analgesic. By comparison with other drugs, including morphine, Prodilidine has a prompt and unusually sustained antinociceptive action in rodents by all routes. Prodilidine substantially lacks antipyretic, anti-inflammatory, antitussive, constipating, respiratory depressant, and cardiovascular effects. Prodilidine resembles meperidine in excitatory properties and body-temperature lowering action at high dosage. The d-isomer is about twice as potent and toxic as the l-isomer parenterally; by the gastric route, the difference is markedly less.

Puromycin dihydrochloride belongs to the aminonucleoside family of antibiotics and is isolated from Streptomyces alboniger. Since the partial structure of this antibiotic showed it to be a purine derivative, puromycin was assigned as its generic name. Puromycin is a broad spectrum antibiotic and antibacterial agent. It is active against Gram-positive microorganisms, less active against acid-fast bacilli, and weakly active against Gram-negative microorganisms. It acts very quickly and can kill 99% of the cells within 2 days. It also exhibits antitumor activity in studies on brain tumor cells. Puromycin is a protein synthesis inhibitor that causes premature chain termination by acting as an analog of the 3’-terminal end of aminoacyl-tRNA. It has been used to study transcriptional regulatory mechanisms that control the sequential and coordinate expression of genes during cell differentiation.

Methaphenilene, an antihistaminic agent, was studied as a peroxisome proliferator. Information about the current use of this compound is not available.

Ampyzine is a pyrazine derivative patented by Warner-Lambert Pharmaceutical Co. as a central nervous system stimulant.