p-Fluorofentanyl is an opioid analgesic being an analogue of fentanyl developed by Janssen Pharmaceutica in the 1960s. p-Fluorofentanyl was sold briefly on the US black market in the early 1980s, before the introduction of the Federal Analog Act which for the…

Paliroden is an orally active neurotrophic, non-peptidic compound that activates synthesis of endogenous neurotrophines. Studies show that use of paliroden increased the rate of formation of both neural progenitors and mature neurons. It is indicated for use …

Developed by Achaogen biopharmaceuticals, plazomicin is a next-generation aminoglycoside synthetically derived from [DB12604]. The structure of plazomicin was established via appending hydroxylaminobutyric acid to [DB12604] at position 1 and 2-hydroxyethyl gr…

Prednicarbate is a relatively new topical corticosteroid drug that displays a similar potency as [hydrocortisone]. It is used in the treatment of inflammatory skin diseases, such as atopic dermatitis. It has a favorable benefit-risk ratio, with an inflammator…

A thiourea antithyroid agent. Propythiouracil inhibits the synthesis of thyroxine and inhibits the peripheral conversion of throxine to tri-iodothyronine. It is used in the treatment of hyperthyroidism. (From Martindale, The Extra Pharmacopeoia, 30th ed, p534)

The 4-carboxyaldehyde form of vitamin B 6 which is converted to pyridoxal phosphate which is a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. [PubChem]

This is the active form of vitamin B6 serving as a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. During transamination of amino acids, pyridoxal phosphate is transiently converted int…

Pyridoxine is the 4-methanol form of vitamin B6, an important water-soluble vitamin that is naturally present in many foods. As its classification as a vitamin implies, Vitamin B6 (and pyridoxine) are essential nutrients required for normal functioning of man…

An organic compound used often as a reagent in organic synthesis, as a flavoring agent, and in tanning. It has been demonstrated as an intermediate in the metabolism of acetone and its derivatives in isolated cell preparations, in various culture media, and i…

Quinupristin/dalfopristin is a combination of two antibiotics used to treat infections by staphylococci and by vancomycin-resistant Enterococcus faecium. Dalfopristin inhibits the early phase of protein synthesis in the bacterial ribosome and quinupristin inh…

RG2417 is a proprietary formulation of uridine, a biological compound essential for the synthesis of DNA and RNA, the basic hereditary material found in all cells, and numerous other factors essential for cell metabolism. Uridine is synthesized by the mitocho…

Producing a broad-spectrum activity against several RNA and DNA viruses, Ribavirin is a synthetic guanosine nucleoside and antiviral agent that interferes with the synthesis of viral mRNA. It is primarily indicated for use in treating hepatitis C and viral he…

An RNA synthesis inhibitor that is used as an antiviral agent in the prophylaxis and treatment of influenza.

Roquinimex is a derivative of quinoline that presents immunostimulant properties. Its effects are suggested to increase the activity of NK cells and macrophage cytotoxicity. Additionally, roquinimex is known to inhibit angiogenesis and to decrease the synthes…

Roxithromycin is a semi-synthethic macrolide antibiotic that is structurally and pharmacologically similar to [erythromycin], [azithromycin], or [clarithromycin]. It was shown to be more effective against certain Gram-negative bacteria, particularly _Legionel…

Salsalate is a nonsteroidal anti-inflammatory agent for oral administration. Salsalate's mode of action as an anti-inflammatory and antirheumatic agent may be due to inhibition of synthesis and release of prostaglandins. The usefulness of salicylic acid, the …

Sapropterin (tetrahydrobiopterin or BH4) is a cofactor in the synthesis of nitric oxide. It is also essential in the conversion of phenylalanine to tyrosine by the enzyme phenylalanine-4-hydroxylase; the conversion of tyrosine to L-dopa by the enzyme tyrosine…

SC12267 is a novel, small molecule agent from the class of DMARDs (disease modifying anti-rheumatic drug) for the therapy of autoimmune diseases such as rheumatoid arthritis or multiple sclerosis. Through highly selective inhibition of pyrimidine biosynthesis…

Scopolamine is a tropane alkaloid isolated from members of the _Solanaceae_ family of plants, similar to [atropine] and [hyoscyamine], all of which structurally mimic the natural neurotransmitter [acetylcholine].[A228423, A228763] Scopolamine was first synthe…

Seladelpar is a peroxisome proliferator-activated receptor (PPAR)-delta (?) agonist. Seladelpar is a single enantiomer of the R-configuration.[L51149] On August 14, 2024, seladelpar was granted accelerated approval by the FDA for the treatment of primary bili…

A non-essential amino acid occurring in natural form as the L-isomer. It is synthesized from glycine or threonine. It is involved in the biosynthesis of purines; pyrimidines; and other amino acids.

Smilagenin is a novel non-peptide, orally bioavailable neurotrophic factor inducer that readily reverses free radical neurotoxicity produced by 1-ethyl-4- phenylpyridium (MPP+) in dopaminergic neurones and reverses the decrease of neuronal growth factors and …

Sofosbuvir (tradename Sovaldi) is a direct acting antiviral medication used as part of combination therapy to treat chronic Hepatitis C, an infectious liver disease caused by infection with Hepatitis C Virus (HCV). HCV is a single-stranded RNA virus that is c…

An antitumor antibiotic produced by Streptomyces sparsogenes. It inhibits protein synthesis in 70S and 80S ribosomal systems. [PubChem]

Squalene is originally obtained from shark liver oil. It is a natural 30-carbon isoprenoid compound and intermediate metabolite in the synthesis of cholesterol. It is not susceptible to lipid peroxidation and provides skin protection. It is ubiquitously distr…

Sulfacytine is a short-acting sulfonamide. The sulfonamides are synthetic bacteriostatic antibiotics with a wide spectrum against most gram-positive and many gram-negative organisms. However, many strains of an individual species may be resistant. Sulfonamide…

Sulfadimethoxine is a sulfonamide antibiotic. Sulfadimethoxine is used to treat many infections, including treatment of respiratory, urinary tract, enteric, and soft tissue infections. It is most frequently used in veterinary medicine, although it is approved…

Sulfamethoxazole is a bacteriostatic sulfonamide antibiotic that interferes with folic acid synthesis in susceptible bacteria.[L11830] It is generally given in combination with [trimethoprim], which inhibits a sequential step in bacterial folic acid synthesis…

Sulindac is a nonsteroidal anti-inflammatory drug (NSAID) of the arylalkanoic acid class that is marketed by Merck under the brand name Clinoril. Like other NSAIDs, it may be used in the treatment of acute or chronic inflammatory conditions. Sulindac is a pro…

Sulopenem etzadroxil is a prodrug of the penem antibacterial [sulopenem]. Like other beta-lactam antibacterials, it is a time-dependent inhibitor of bacterial cell wall synthesis.[L51768] Sulopenem etzadroxil was approved by the FDA in October 2024 for the…

An ibuprofen-type anti-inflammatory analgesic and antipyretic. It inhibits prostaglandin synthesis and has been proposed as an anti-arthritic. It is no longer approved for use in the United States.

TAS-102 (Taiho Pharma USA, Inc.) is an anti-cancer drug under development and in stage 3 clinical trials for the treatment of colorectal cancer. It is composed of the thymidine phosphorylase inhibitor (TPI) tipiracil and the cytotoxin trifluridine. Trifluridi…

Tavaborale is a novel, boron-based topical antifungal medication for the treatment of onychomycosis, a fungal infection of the nail and nail bed due to *Trichophyton rubrum* or *Trichophyton mentagrophytes* infection. Tavaborole functions by inhibiting Leucyl…

Tegafur (INN, BAN, USAN) is a prodrug of [DB00544] (5-FU), an antineoplastic agent used as the treatment of various cancers such as advanced gastric and colorectal cancers. It is a pyrimidine analogue used in combination therapies as an active chemotherapeuti…

Telithromycin, a semi-synthetic erythromycin derivative, belongs to a new chemical class of antibiotics called ketolides. Ketolides have been recently added to the macrolide-lincosamide-streptogramin class of antibiotics. Similar to the macrolide antibiotics,…

Temazepam, like many other similar and related benzodiazepines, acts as a gamma-aminobutyric acid (GABA) modulator and is capable of eliciting a variety of actions including sedation, hypnosis, skeletal muscle relaxation, anticonvulsant activity, and anxiolyt…

Teniposide is a semisynthetic derivative of podophyllotoxin that exhibits antitumor activity. Teniposide inhibits DNA synthesis by forming a complex with topoisomerase II and DNA. This complex induces breaks in double stranded DNA and prevents repair by topoi…

Terbinafine hydrochloride (Lamisil) is a synthetic allylamine antifungal.[L9065,L9068] It is highly lipophilic in nature and tends to accumulate in skin, nails, and fatty tissues.[A1279] Like other allylamines, terbinafine inhibits ergosterol synthesis by inh…

Teriflunomide is the active metabolite of leflunomide, and it acts as an immunomodulatory agent by inhibiting pyrimidine synthesis. It is marketed under the name Aubagio® and is indicated for the treatment of multiple sclerosis, specifically relapsing forms. …

Thienylfentanyl is a fentanyl analog analgesic that was sold on the black market in the 1980s until the Federal Analog Act scheduled drugs based on structural similarity rather than scheduling drugs individually. Thienylfentanyl has a similar synthesis pathwa…

Thymectacin, a phosphoramidate derivative of (E)-5-(2-bromovinyl)-2'-deoxyuridine, is a novel small molecule anticancer agent. Thymectacin is selectively active against tumor cells expressing high levels of thymidylate synthase (TS), a critical enzyme in DNA …

Tioconazole is an imidazole antifungal used to treat fungal and yeast infections. Topical formulations are used for ringworm, jock itch, athlete's foot, and tinea versicolor or "sun fungus". Tioconazole interacts with 14-alpha demethylase, a cytochrome P-450 …

4-Amino-5-cyano-7-(D-ribofuranosyl)-7H- pyrrolo(2,3-d)pyrimidine. Antibiotic antimetabolite isolated from Streptomyces toyocaensis cultures. It is an analog of adenosine, blocks RNA synthesis and ribosome function, and is used mainly as a tool in biochemistry.

Trimethoprim is an antifolate antibacterial agent that inhibits bacterial dihydrofolate reductase (DHFR), a critical enzyme that catalyzes the formation of tetrahydrofolic acid (THF) - in doing so, it prevents the synthesis of bacterial DNA and ultimately con…

An organic amine proton acceptor. It is used in the synthesis of surface-active agents and pharmaceuticals; as an emulsifying agent for cosmetic creams and lotions, mineral oil and paraffin wax emulsions, as a biological buffer, and used as an alkalizer. (Fro…

Tunicamycin is a mixture of homologous nucleoside antibiotics that inhibits the UDP-HexNAc: polyprenol-P HexNAc-1-P family of enzymes. One member of this family is the enzyme GlcNAc phosphotransferase (GPT), which catalyzes the transfer of N-acetylglucosamine…

Turpentine, also known as spirit of turpentine, oil of turpentine, and wood turpentine, is a liquid extracted from live trees, mainly pine, through distillation of resin. It is used as a solvent and base material in organic synthesis reactions. Turpentine is …

Tyrosinase is a multi-copper-containing multifunctional metalloenzyme with 4 possible oxidation states.[A231829, A231834, A231839] It is responsible for producing melanin pigment across the phylogenetic spectrum.[A231829, A231834, A231839] Within mammals, …

A nucleoside diphosphate sugar which serves as a source of glucuronic acid for polysaccharide biosynthesis. It may also be epimerized to UDP iduronic acid, which donates iduronic acid to polysaccharides. In animals, UDP glucuronic acid is used for formation o…

The decarboxylation product of UDPglucuronic acid, which is used for formation of the xylosides of seryl hydroxyl groups in mucoprotein synthesis. Also forms plant xylans.