Pyrroles

Pyrrole is a heterocyclic, aromatic, organic compound, a five-membered ring with the formula . It is a colorless volatile liquid that darkens readily upon exposure to air. Substituted derivatives are also called pyrroles, e.g., N-methylpyrrole, . Porphobilinogen, a trisubstituted pyrrole, is the biosynthetic precursor to many natural products such as heme.

Atorvastatin, sold under the brand name Lipitor among others, is a statin medication used to prevent cardiovascular disease in those at high risk and to treat abnormal lipid levels. For the prevention of cardiovascular disease, statins are a first-line treatment in reducing cholesterol. It is taken by mouth.

Physostigmine (also known as eserine from éséré, the West African name for the Calabar bean) is a highly toxic parasympathomimetic alkaloid, specifically, a reversible cholinesterase inhibitor. It occurs naturally in the Calabar bean and the fruit of the Manchineel tree.

Batrachotoxin (BTX) is an extremely potent cardiotoxic and neurotoxic steroidal alkaloid found in certain species of beetles, birds, and frogs. The name is from the Greek word . Structurally-related chemical compounds are often referred to collectively as batrachotoxins. In certain frogs, this alkaloid is present mostly on the skin. Such frogs are among those used for poisoning darts. Batrachotoxin binds to and irreversibly opens the sodium channels of nerve cells and prevents them from closing, resulting in paralysis and death. No antidote is known.

Porphobilinogen (PBG) is an organic compound that occurs in living organisms as an intermediate in the biosynthesis of porphyrins, which include critical substances like hemoglobin and chlorophyll.

Sunitinib, sold under the brand name Sutent, is an anti-cancer medication. It is a small-molecule, multi-targeted receptor tyrosine kinase (RTK) inhibitor that was approved by the FDA for the treatment of renal cell carcinoma (RCC) and imatinib-resistant gastrointestinal stromal tumor (GIST) in January 2006. Sunitinib was the first cancer drug simultaneously approved for two different indications.

Ryanodine is a poisonous diterpenoid found in the South American plant Ryania speciosa (Salicaceae). It was originally used as an insecticide.

Stercobilinogen (fecal urobilinogen) is a chemical created by bacteria in the gut. It is made of broken-down hemoglobin. It is further processed to become the chemical that gives feces its brown color.

class=skin-invert-image|thumb|Polypyrrole class=skin-invert-image|thumb|Pyrrole can be polymerised electrochemically. Polypyrrole (PPy) is an organic polymer obtained by oxidative polymerization of pyrrole. It is a solid with the formula H(C4H2NH)nH. It is an intrinsically conducting polymer, used in electronics, optical, biological and medical fields.

Tolmetin () is a nonsteroidal anti-inflammatory drug (NSAID) of the heterocyclic acetic acid derivative class.

Prodigiosin is a red dye produced by many strains of the bacterium Serratia marcescens, as well as other Gram-negative, gamma proteobacteria such as Vibrio psychroerythrus and Hahella chejuensis. It is responsible for the pink tint occasionally found in grime that accumulates on porcelain surfaces such as bathtubs, sinks, tiles and toilet bowls. It is in the prodiginine family of compounds which are produced in some Gram-negative gamma proteobacteria, as well as select Gram-positive Actinobacteria (e.g. Streptomyces coelicolor). The name prodigiosin is derived from prodigious (i.e. something m

Chlorfenapyr is an insecticide, and specifically a pro-insecticide (meaning it is metabolized into an active insecticide after entering the host). It is derived from a class of microbially produced compounds known as halogenated pyrroles.

Pyrrolnitrin (PRN) is a naturally occurring phenylpyrrole fungicide. Pseudomonas and Burkholderia species produce pyrrolnitrin from tryptophan as secondary metabolite. It is believed that the antifungal properties come from inhibition of electron transport system.

Pyrvinium (Viprynium) is an anthelmintic effective for pinworms. Several forms of pyrvinium have been prepared with variable counter anions, such as halides, tosylate, triflate and pamoate. Pyrvinium was identified as a potent Wnt inhibitor, acting through activation of Casein kinase CK1α.

chemical reaction

Atogepant, sold under the brand name Qulipta among others, is a medication used to prevent migraines. It is a gepant, a calcitonin gene-related peptide receptor antagonist administered orally.

thumb|Samples of halogenated BODIPY dyes in ambient lighting and fluorescing under UV

Viminol (marketed under the brandname Dividol) is an opioid analgesic developed by a team at the drug company Zambon in the 1960s. Viminol is based on the α-pyrryl-2-aminoethanol structure, unlike any other class of opioids.

Zomepirac is an orally effective nonsteroidal anti-inflammatory drug (NSAID) that has antipyretic actions. It was developed by McNeil Pharmaceutical, approved by the FDA in 1980, and sold as the sodium salt zomepirac sodium, under the brand name Zomax. Due to its clinical effectiveness, it was preferred by doctors in many situations and obtained a large share of the analgesics market; however, it was subsequently withdrawn in March 1983 due to its tendency to cause serious anaphylaxis in a small, but unpredictable, subset of the patient population.

A23187 is a mobile ion-carrier that forms stable complexes with divalent cations (ions with a charge of +2). A23187 is also known as Calcimycin, Calcium Ionophore, Antibiotic A23187 and Calcium Ionophore A23187. It is produced at fermentation of Streptomyces chartreusensis.

Osilodrostat, sold under the brand name Isturisa, is a medication used for the treatment of adults with Cushing's disease who either cannot undergo pituitary gland surgery or have undergone the surgery but still have the disease. Osilodrostat is an orally active (taken by mouth), nonsteroidal corticosteroid biosynthesis inhibitor which was developed by Novartis for the treatment of Cushing's syndrome and pituitary hypersecretion (a specific subtype of Cushing's syndrome). It specifically acts as a potent and selective inhibitor of 11beta-hydroxylase (CYP11B1).

Roseophilin is an antibiotic isolated from Streptomyces griseoviridis shown to have antitumor activity. The chemical structure can be considered in terms of two components, a macrotricyclic segment and a heterocyclic side-chain. Several laboratory syntheses of roseophilin (e.g., those of Trost, Fürstner, Salamone) are based upon the Paal-Knorr synthesis, and two others are based on the Nazarov cyclization reaction (those of Tius, Frontier). The compound is related to the prodiginines.

YCT529 is an experimental non-hormonal male contraceptive developed by YourChoice Therapeutics. It functions as a selective antagonist of the retinoic acid receptor alpha (RAR-α), a nuclear receptor involved in vitamin A signaling. By inhibiting RAR-α, YCT529 disrupts spermatogenesis, leading to temporary infertility. YCT529 targets RAR-α, which plays a crucial role in the vitamin A signaling pathway essential for sperm production. By selectively inhibiting RAR-α, the drug impedes the development and maturation of sperm cells without affecting other physiological processes governed by vitamin

Obatoclax mesylate, also known as GX15-070, is an experimental drug for the treatment of various types of cancer. It was discovered by Gemin X, which was acquired by Cephalon, which has since been acquired by Teva Pharmaceuticals. Several Phase II clinical trials were completed that investigated use of obatoclax in the treatment of leukemia, lymphoma, myelofibrosis, and mastocytosis.

Isamoltane (developmental code name CGP-361A) is a beta blocker (β-adrenergic receptor antagonist) with additional serotonin 5-HT1A and 5-HT1B receptor antagonist activity. It has about 5-fold higher affinity for the serotonin 5-HT1B receptor (Ki = 21nM) over the serotonin 5-HT1A receptor (Ki = 112nM). It has anxiolytic effects in rodents. The drug was under development by Novartis and AstraZeneca for the treatment of anxiety disorders in the 1990s but was never marketed.

Ilaprazole (trade name Noltec) is a proton pump inhibitor (PPI) used in the treatment of dyspepsia, peptic ulcer disease (PUD), gastroesophageal reflux disease (GORD/GERD) and duodenal ulcer.

Semaxanib (INN, codenamed SU5416) is a tyrosine-kinase inhibitor drug designed by SUGEN as a cancer therapeutic. It is an experimental stage drug, not licensed for use on human patients outside clinical trials. Semaxanib is a potent and selective synthetic inhibitor of the Flk-1/KDR vascular endothelial growth factor (VEGF) receptor tyrosine kinase. It targets the VEGF pathway, and both in vivo and in vitro studies have demonstrated antiangiogenic potential.

Fludioxonil is a synthetic phenylpyrrole chemical introduced by Ciba-Geigy (now Syngenta) in 1993 for use as a non-systemic fungicide. It is a structural analog of the natural fungicide pyrrolnitrin.

Ageliferin is a chemical compound produced by some sponges. It was first isolated from Caribbean and then Okinawan marine sponges in the genus Agelas. It often co-exists with the related compound sceptrin and other similar compounds. It has antibacterial properties and can cause biofilms to dissolve. Total syntheses have been independently accomplished by the research groups of Phil S. Baran at the Scripps Research Institute, Chuo Chen at UT Southwestern Medical Center, Patrick Harran at UCLA, and Daisuke Urabe at Toyama Prefectural University.

Toceranib (INN), sold under the brand name Palladia, is a receptor tyrosine kinase inhibitor that is used in the treatment of canine mast cell tumor also called mastocytoma. It is the first medication developed specifically for the treatment of cancer in dogs. It is used as its phosphate salt, toceranib phosphate. It was developed by SUGEN as SU11654, a sister compound to sunitinib, which was later approved for human therapies. Toceranib is a tyrosine kinase inhibitor and works in two ways: by killing tumor cells and by cutting off the blood supply to the tumor.

Lorpiprazole (INN; brand name Normarex) is an anxiolytic drug of the phenylpiperazine group. It has been described as a serotonin antagonist and reuptake inhibitor (SARI) in the same group as trazodone, nefazodone, and etoperidone.

Nargenicin (CP-47,444, CS-682) is a 28 carbon macrolide with a fused tricyclic core that has in addition a unique ether bridge. The polyketide antibiotic was isolated from Nocardia argentinensis. Nargenicin is effective towards gram-positive bacteria and been shown to have strong antibacterial activity against Staphylococcus aureus, including strains that are resistant to methicillin. It has also been shown to induce cell differentiation and inhibit cell proliferation in a human myeloid leukemia cell line. __TOC__ ==Biosynthesis== The biosynthesis of nargenicin is believed to be closely relate

Esaxerenone () (brand name Minnebro; developmental code names CS-3150, XL-550) is a nonsteroidal antimineralocorticoid which was discovered by Exelixis and developed by Daiichi Sankyo Company and is approved in Japan for the treatment of hypertension. It acts as a highly selective silent antagonist of the mineralocorticoid receptor (MR), the receptor for aldosterone, with greater than 1,000-fold selectivity for this receptor over other steroid hormone receptors, and 4-fold and 76-fold higher affinity for the MR relative to the existing antimineralocorticoids spironolactone and eplerenone.

Saroglitazar (INN, trade names Lipaglyn, Bilypsa) is a drug for the treatment of type 2 diabetes mellitus, dyslipidemia, NASH and NAFLD It is approved for use in India by the Drug Controller General of India. Saroglitazar is indicated for the treatment of diabetic dyslipidemia and hypertriglyceridemia with type 2 diabetes mellitus not controlled by statin therapy. In clinical studies, saroglitazar has demonstrated reduction of triglycerides (TG), LDL cholesterol, VLDL cholesterol, non-HDL cholesterol and an increase in HDL cholesterol a characteristic hallmark of atherogenic diabetic dyslipide