Mertansine (Maytansine) is a 19–member ansa macrolide structure attached to a chlorinated benzenering. It was originally isolated from the shrub Maytenus ovatus. Mertansine (DM1) is a tubulin inhibitor, it inhibits the assembly of microtubules by binding to tubulin, with a linker structure can create an antibody-drug conjugate (ADC). Mertansine is a potent microtubule-targeted compound that induces mitotic arrest and kills tumor cells at sub-nanomolar concentrations. The antimitotic effect of maytansine has been attributed to its ability to inhibit microtubule assembly by binding to tubulin with a KD of ~ 1 umol/L, at or near the vinblastine-binding site. Experimental ADCs with the SPP-DM1 design include lorvotuzumab mertansine. DM1 can also be linked to an antibody using the SMCC (4-(3-mercapto-2,5-dioxo-1-pyrrolidinylmethyl)-cylohexanecarboxylic acid) linker, in which case the International Nonproprietary Name of the conjugate formed contains the word emtansine. DM1 and its attachment via these linkers result from ImmunoGen Inc research. Trastuzumab emtansine (T-DM1) is an anti-HER2/neu antibody-drug conjugate.

Cinobufagin is a bufadienolide compound extracted from the dried venom secreted by the parotid glands of toads and one of the glycosides in the traditional Chinese medicine ChanSu, with potential antineoplastic activity. Cinobufagin has been shown to have clinical applications in cancer treatment as well as immunomodulatory and analgesic properties. Cinobufagin induces apoptosis of osteosarcoma cells through inactivation of Notch signaling. Cinobufagin induces autophagy-mediated cell death in human osteosarcoma U2OS cells through the ROS/JNK/p38 signaling pathway. Cinobufagin significantly relieved cancer pain in mice and raised their pain threshold, mainly upregulating the expression levels of beta-Endorphin and μ- opioid receptor in the hind paw tumor and adjacent tissue. In combination with gemcitabine-oxaliplatin cinobufagin was used in clinical trial for the treatment of locally advanced or metastatic gallbladder carcinoma.

Omidenepag isopropyl, a prodrug, is hydrolyzed in the eye to the active form (Omidenepag) which functions as a selective, nonprostaglandin, prostanoid EP2 agonist, has been developed by Ube Industries and Santen Pharmaceutical as an ophthalmic solution (EYBELIS®) for the treatment of glaucoma and ocular hypertension. Omidenepag isopropyl increases the outfow of aqueous humor via both the uveoscleral outfow and the trabecular outfow pathways, resulting in potent and stable reduction in intraocular pressure (IOP). In September 2018, omidenepag isopropyl ophthalmic solution 0.002% was approved in Japan for the treatment of glaucoma and ocular hypertension. On September 22, 2022, the FDA approved Santen’s Omlonti (omidenepag isopropyl), for the reduction of elevated intraocular pressure in patients with open-angle glaucoma or ocular hypertension.

p-cresol, also known as also 4-methylphenol, is a unique bacterial metabolite from protein fermentation that is not produced by human enzymes, this metabolites has been frequently used to assess the degree of proteolytic fermentation. Recently investigation showed that p-cresol measurements might help to predict cardiovascular disease risk in renal patients over a wide range of residual renal function, beyond traditional markers of glomerular filtration. In addition, there were studies, which revealed, that urinary p-cresol was elevated in young French children with autism spectrum disorder.

Rifamycin SV is a derivative of antibiotic rifamycin B (the natural fermentation product of S. mediterranei broths). The primary target of rifampicin on whole bacteria is the synthesis of RNA. Rifamycin belongs to the ansamycin class of antibacterial drugs and acts by inhibiting the beta subunit of the bacterial DNA-dependent RNA polymerase, blocking one of the steps in DNA transcription. This results in inhibition of bacterial synthesis and consequently growth of bacteria. Rifampicin exhibits bactericidal activity on Gram-positive and Gram-negative bacteria and on mycobacteria. Rifamycin SV MMX® (AEMCOLO), a non-absorbable rifamycin antibiotic formulated using the multi-matrix system, was designed to exhibit its pharmacological action on the distal small intestine and colon. AEMCOLO is indicated for the treatment of travelers’ diarrhea (TD) caused by non-invasive strains of Escherichia coli in adults.

Macimorelin (AEZS 130) is an orally active, small-molecule, peptidomimetic growth hormone secretagogue receptor (GHSR1A) agonist (ghrelin analogue), being developed by AEterna Zentaris for the diagnosis of adult growth hormone deficiency (AGHD; somatotropin deficiency), and for the treatment of cachexia associated with chronic disease such as AIDS and cancer. Macimorelin was approved by the FDA in December 2017 under the market name Macrilen for oral solution. Macimorelin stimulates GH release by activating growth hormone secretagogue receptors present in the pituitary and hypothalamus. Macimorelin has been granted orphan drug designation by the FDA for diagnosis of AGHD.

Lesinurad (brand name Zurampic) is a urate transporter inhibitor for treating hyperuricemia associated with gout in patients who have not achieved target serum uric acid levels with a xanthine oxidase inhibitor alone. In gout patients, Lesinurad lowered serum uric acid levels and increased renal clearance and fractional excretion of uric acid. Following single and multiple oral doses of Lesinurad to gout patients, dose-dependent decreases in serum uric acid levels and increases in urinary uric acid excretion were observed. Lesinurad reduces serum uric acid levels by inhibiting the function of transporter proteins involved in uric acid reabsorption in the kidney. Lesinurad inhibited the function of two apical transporters responsible for uric acid reabsorption, uric acid transporter 1 (URAT1) and organic anion transporter 4 (OAT4), with IC50 values of 7.3 and 3.7 µM, respectively. URAT1 is responsible for the majority of the reabsorption of filtered uric acid from the renal tubular lumen. OAT4 is a uric acid transporter associated with diuretic-induced hyperuricemia. Lesinurad does not interact with the uric acid reabsorption transporter SLC2A9 (Glut9), located on the basolateral membrane of the proximal tubule cell. Based on in vitro studies, lesinurad is an inhibitor of OATP1B1, OCT1, OAT1, and OAT3; however, lesinurad is not an in vivo inhibitor of these transporters. In vivo drug interaction studies indicate that lesinurad does not decrease the renal clearance of furosemide (substrate of OAT1/3), or affect the exposure of atorvastatin (substrate of OATP1B1) or metformin (substrate of OCT1). Based on in vitro studies, lesinurad has no relevant effect on P-glycoprotein.

Indacaterol is an ultra-long-acting beta-adrenoceptor agonist developed by Novartis. It was approved by the European Medicines Agency (EMA) under the trade name Onbrez Breezhaler on November 30, 2009, and by the United States Food and Drug Administration (FDA), under the trade name Arcapta Neohaler, on July 1, 2011. It needs to be taken only once a day, unlike the related drugs formoterol and salmeterol. It is licensed only for the treatment of chronic obstructive pulmonary disease (COPD) (long-term data in patients with asthma are thus far lacking). It is delivered as an aerosol formulation through a dry powder inhaler.

Telaprevir (marketed under the brand names Incivek and Incivo) is a direct-acting antiviralagent against the hepatitis C virus (HCV). It is a hepatitis C virus NS3/4A protease inhibitor indicated for the treatment of genotype 1 chronic hepatitis C (CHC) in adult patients with compensated liver disease, including cirrhosis, who are treatment-naïve or who have been previously treated with interferon-based treatment, including prior null responders, partial responders, and relapsers in combination with peginterferon alfa and ribavirin. Telaprevir is not used as a monotherapy. It is necessary for the proteolytic cleavage of the HCV encoded polyprotein into mature forms of the NS4A, NS4B, NS5A and NS5B proteins and essential for viral replication. It belongs to the chemical class of alpha-ketoamids and binds to NS3/4A in a covalent but reversible manner.

1,1,1-trichloroethane (methyl chloroform) is a colorless liquid or vapour with a sharp sweet smell. It dissolves in water and other chemicals and easily evaporates into the air. TCE is non-flammable. Trichloroethane is used as a solvent and degreasing agent in industry. It is an ingredient in consumer products such as household cleaners, glues, and aerosol sprays. Methyl chloroform is also used as a chemical intermediate in the production of vinylidene chloride. It was formerly used as a food and grain fumigant. Excessive absorption of this substance through the lungs or gastrointestinal tract produces central nervous system (CNS) depression proportional to the amount absorbed. Mild liver and kidney dysfunction may occur transiently following recovery from CNS depression. The consumption of trichloroethane has been banned by the 1987 Montreal Protocol because of its ozone-depleting potential.