Apan (PPI-1019) is the lead compound of a series of β-amyloid-derived peptides designed by Praecis Pharmaceuticals in the US to interact with β-amyloid peptide, facilitating its clearance. Apan is derived from the D-enantiomeric Cholyl-LVFFA-NH2. Apan is developed by Praecis Pharmaceuticals to treat Alzheimer's Disease. Apan inhibits the aggregation of beta-amyloid and its associated nerve cell toxicity. In addition, Apan reaches the brain in quantities that are sufficient to block the aggregation of beta-amyloid molecules and alter the course of the disease. PPI-1019 completed phase I and II clinical trials and was found to be safe, well tolerated and amenable to cross bbb. After peptide administration, levels of Aβ1-40 in the CSF increased, which might be discussed as a sign for Aβ clearance out of the brain. PI-1019 had been in phase I/II clinical trials by Praecis Pharmaceuticals (acquired by GlaxoSmithKline in 2007) for the treatment of Alzheimer's disease(AD). However, this study had been discontinued.

MK-0533 is a novel selective peroxisome proliferator-activated receptor gamma modulator for the treatment of type 2 diabetes mellitus. In comparison with PPARγ full agonists, MK-0533 displayed diminished maximal activity (partial agonism) in cell-based transcription activation assays and attenuated gene signatures in adipose tissue. MK-0533 exhibited comparable efficacy to rosiglitazone and pioglitazone in vivo. However, with regard to the induction of untoward events, MK-0533 displayed no cardiac hypertrophy, attenuated increases in brown adipose tissue, minimal increases in plasma volume, and no increases in extracellular fluid volume in vivo. MK-0533 was teste in phase II clinical trials but future development was discontinued.

Doretinel is a member of a class of compounds known collectively as retinoids. As a topical gel, it was being studied for its potential use as a dermatological product.

Benzylpenilloic acid is a metabolite of benzylpenicillin. It is produced by hydrolysis of when beta-lactam ring of benzylpenicillin. Along with some other metabolites of penicillin, benzylpenilloic acid is responsible for the allergic reaction to beta-lactam antibiotic. It is a component of a minor determinant mixture (MDM) reagent which is used to evaluate sensitivity to penicillin in the clinic.

B-Trisaccharide belongs to the class of organic compounds known as fatty acyl glycosides of mono- and disaccharides. B-Trisaccharide in blood group B is excreted when an individual is given Galactose. The B-trisaccharide was the only oligosaccharide detected in plasma after galactose administration to a blood-group-B secretor individual. The structure of the branched blood group B trisaccharide alone has been studied both by X-ray crystallography and by NMR.

A-TRISACCHARIDE (or Blood group A trisaccharide), a core antigen fragment in ABO blood group system. It was found to be a major urinary carbohydrate depending on diet and blood type.

Growth hormone releasing hexapeptide (GHRP-6) is a synthetic met-enkephalin analog that induces the release of growth hormone in vivo through binding of the ghrelin receptor. GHRP-6 increases proliferation in astrocytes through a mechanism that involves PI3K/Akt signaling. GHRP-6 also inhibits development of restraint stress-induced gastric lesions and reverses ovariectomy-induced effects on serum glucose and insulin levels. Additionally, GHRP-6 decreases locomotor activity and increases food intake in vivo. Essentially a synthetic version of ghrelin analogue, GHRP-6 (like GHRP-2) stimulates the release of an endogenous growth hormone (GH) within the somatotropes of the anterior pituitary in the animal and human body. Specifically, GHRP-6 will increase the number of somatotropes in a GH pulse by limiting the amount of somatostatin present, while standard GHRH increases the amplitude at which the pituitary cells pulse. Unlike ghrelin, GHRP-6 is not specifically used to increase appetite, but it may have secondary actions that impact hypothalamic neurons. These effects last for approximately an hour after the initial application, which mimics the natural application of GH, and consists of an eight hour circulation period. In studies GHRP-6 has shown biological actions similar to the naturally occurring hunger stimulating peptide ghrelin. Its main use is to promote food intake by stimulating hunger and aid in energy metabolism. It can be used in the treatment of GH deficiency as well as cachexia, eating disorders and obesity. GHRP-6 is a synthetic met-enkephalin (a naturally occurring opioid growth factor) analog. GHRP-6 contains D-amino acids that are entirely synthetic, lacks opioid activity, and shares no sequence relation with GHRH. It has also been shown that GHRP-6 can lead to re-stimulation of the natural production of HGH. Studies have shown that GHRP-6 increases the secretion of IGF-1 (InsulinLike Growth Factor 1) by the liver, which is speculated to be a required component in the anabolic mechanisms leading to the action of HGH. It also appears that GHRP-6 has positive implications for the central nervous system, as ghrelin is known to protect neurons.