Mespirenone (ZK 94679, 15β,16β-methylene-spironolactone) is a steroid aldosterone antagonist. In addition, it is a quite specific inhibitor of adrenocortical mineralocorticoid synthesis. In rodents mespirenone effectively prevents aldosterone-induced hypertension. It exerts natriuretic efficacy. Although it reached phase II clinical trials, it was discontinued in 1989.

Minocromil was studied as a histamine receptor antagonist for the treatment of asthma. However, further development of the drug was discontinued.

Butocrolol amino alcohol derivative with β-adrenolytic, antiarrhythmic, and local anesthetic properties having sympatholytic and antiarrhythmic effects comparable to those of propranolol, but with lower local anesthetic effects.

Amotosalen (S-59, psoralen derivative), a chemical capable of binding to nucleic acids is added to platelets. UVA illumination (320 – 400 nm wavelengths) of amotosalen-treated platelet components induces covalent cross-linking of any nucleic acids to which amotosalen is bound; thereby, preventing further replication. Amotosalen is used in the INTERCEPT process to cross-link DNA and RNA. Amotosalen has protective activity against pathogens such as bacteria, viruses, protozoa, and leukocytes. Prior to administration amotosalen is added to plasma and platelets, then in vivo this agent penetrates pathogens and targets DNA and RNA. Upon activation by ultraviolet A light, amotosalen forms interstrand DNA and RNA crosslinks and prevents replication. Thus, the pathogen-inactivation system using amotosalen/ultraviolet A offers the potential to mitigate the risk of ZIKV transmission by plasma and platelet transfusion. Inactivation of leukocytes can prevent graft versus host disease upon transfusion.

Quincarbate is a quinoline derivative patented by N. V. Philips' Gloeilampenfabrieken as diuretic. At 12.5 mg/kg orally in rats Quincarbate increased urine excretion by 130%.

Volpristin is an antibiotic. Information about the current use of this agent is not available.

Sermetacin, an indometacin derivative, is a nonsteroidal anti-inflammatory agent.

Vinformide (also known as N-formylleurosine), an N-formyl analog of leurosine possesses antineoplastic activity. This drug was studied for the treatment of lymphoma, leukemia and Hodkin’s disease. However, studies were discontinued, because vinformide exerted an acute cardiotoxic side effect.

Salnacedin (also known as G 201) was developed as a topical anti-inflammatory agent; Salnacedin participated in phase II clinical trials in the USA for the treatment of dermatitis, acne, and psoriasis. However, all these studies were discontinued.

Mimbane was developed by Parke-Davis as an analgesic. Information about the current use of the drug is not available.