Guanacline was studied in the treatment of hypertension. However, information about the current use of this compound is not available.

Benzodepa is an aziridine alkylating agent that cross-links with DNA, causing inhibition of DNA synthesis. It has been studied as a potential treatment for a variety of cancers, most notably bronchiogenic carcinoma.

Oxophenarsine was developed as an antisyphilis drug that can inhibit HIV-1 production. However, information about the further development of this drug is not available.

Sanguinarine is an extract of the bloodroot plant Sanguinaria canadensis, a member of the poppy family. It is an inhibitor of protein phosphatases PP1, PP2C and PP2B in vitro. Also inhibits mitogen-activated protein kinase phosphatase-1 (MKP-1) and other enzymes. Sanguinarine exerts a protective effect in cerebral ischemia, and this effect is associated with its anti-inflammatory and anti-apoptotic properties. It was clinically tested as an agent against gingivitis and tooth plaques.

Pentalamide (also known as O-pentylsalicylamide) was developed as an antifungal agent for topical applications. Information about the current use of this drug is not available.

Oxmetidine is an H2-receptor antagonist that was studied as a gastrointestinal agent. Oxmetidine possesses efficacy in the treatment of peptic ulcers. However, information about the further development of this drug is not available.

Ampyrone (4-Aminoantipyrine or AAP) is a metabolite of aminophenazone and is an aromatic substance with analgesic, antipyretic and anti-inflammatory properties. When combined with the antineoplastic agents, ampyrone decreased their genotoxic, mutagenic, apoptotic, and phagocytic effects. However, ampyrone usually produces side effects, such as the risk of agranulocytosis. Although ampyrone is scarcely ever administered as an analgesic because of the potential side effects, as a raw material, it is mostly used to produce ampyrone derivatives, which have better biological activities. In addition, it is used as a reagent for biochemical reactions producing peroxides or phenols and can also be used to detect phenols in the environment. Exposure to ampyrone could induce changes in the enzyme catalase structure and function.

Metalkonium is an antiseptic and disinfectant.