Icofungipen is a generic name of the compound, previously known as BAY 10-8888 or PLD-118. Icofungipen, a cyclic beta-amino acid was developed by PLIVA, under license from Bayer, for the potential oral treatment of fungal infection. The drug exerts its antifungal activity by inhibition of isoleucyl-tRNA synthetase activity and consequently disrupting protein biosynthesis. Phase II trials with an oral formulation of icofungipen were underway in Europe for Candida infection and for the treatment of vulvovaginal candidiasis in the USA, but these studies have been discontinued. In human toxicity studies, suppression of spermatogenesis in male volunteers was observed as a possible off-target adverse event.

Sulfaclomide is a sulfonamide derivative structurally similar to p-aminobenzoic acid, patented by VEB Farbenfabrik Wolfen as antibacterial agent useful for the treatment of infectious diseases. Sulfanilamide competes with p-aminobenzoic acid for the bacterial enzyme dihydropteroate synthase, thereby preventing the incorporation of p-aminobenzoic acid into dihydrofolic acid, the immediate precursor of folic acid. This leads to an inhibition of bacterial folic acid synthesis and de novo synthesis of purines and pyrimidines, ultimately resulting in cell growth arrest and cell death.

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.

Eperezolid is an antibiotic agent developed for the treatment of a wide range of bacterial infections. The drug exerts its action by binding to 50 S ribosome subunit causing the inhibition of protein synthesis in bacterias. Eperezolid was tested in preclinical in vivo models of different becterial diseases in which it was shown to be active.

Difloxacin is an aryl fluoroquinolone derivative. The primary bacterial target of fluoroquinolones is the enzyme deoxyribonucleic acid gyrase. Difloxacin is very potent against a broad spectrum of bacteria including aerobic ana anaerobic gram-positive and gram-negative oragnisms. DICURAL® (difloxacin hydrochloride) TABLETS are indicated for the management of diseases in dogs associated with bacteria susceptible to difloxacin.

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

Furmethoxadone was developed as an antibacterial agent and was studied as an anthelmintic. Information about the current use of this compound is not available.

Sulfasomizole is a sulfanilamide derivative patented by Chemie Grunenthal G. m. b. H. as an antibiotic with broad-spectrum activity. Sulfasomizole is active against a wide range of gram-positive and gram-negative organisms. Sulfasomizole is well absorbed and distributed in the body, and is readily excreted in the urine.

Binfloxacin is a topoisomerase inhibitor that was studied as an antibacterial agent.

Tryparsamide is an arsenic compound with activity against Spirochaetes bacteria. Tryparsamide is used in the treatment of syphilis and African sleeping sickness. For decades Tryparsamide remained the standard treatment for trypanosomiasis. Tryparsamide has two remarkable properties: first, it increases the resistance of the individual by improving his general physical status; and, second, the high penetrability for nervous tissue which it possesses may increase the potential spirocheticidal action of the drug.