(+)-octopamine is an enantiomer of octopamine, a naturally occurring phenolamine acting as a neurotransmitter in invertebrates. Octopamine is considered to be trace amine present in mammalian tissues at very low (nanomolar) concentrations. Generally, the (+)-enantiomers of octopamine are less active than the (-)-enantiomers at adrenergic receptors. However (+)-octopamine is more potent than the (-)-octopamine as an inhibitor of semicarbazide-sensitive amine oxidase.

(-)-octopamine is an enantiomer of octopamine, a naturally occurring phenolamine acting as a neurotransmitter in invertebrates. Octopamine is considered to be trace amine present in mammalian tissues at very low (nanomolar) concentrations. Generally, the (-)-enantiomers of octopamine are more active than the (+)-enantiomers at adrenergic receptors. However (+)-octopamine is more potent than the (-)-octopamine as an inhibitor of semicarbazide-sensitive amine oxidase.

Muscarine or muscarin, a water-soluble toxin, which initially was isolated from the mushroom species Amanita muscar. Muscarine mimics the action of the acetylcholine by binding to the muscarinic acetylcholine receptors and acts as an agonist.

A-582941 was found to exhibit high-affinity binding and agonism at alpha-7 nicotinic acetylcholine receptor (α7-nAChR), with acceptable pharmacokinetic properties and excellent distribution to the central nervous system. In vitro and in vivo studies indicated that A-582941 activates signaling pathways known to be involved in cognitive function such as ERK1/2 and CREB phosphorylation. A-582941 enhanced cognitive performance in behavioral assays including the monkey delayed matching-to-sample, rat social recognition, and mouse inhibitory avoidance models that capture domains of working memory, short-term recognition memory, and long-term memory consolidation, respectively. AbbVie is developing α7-nAChR agonists including A-582941 as neuroprotective agents for the treatment of cognitive disorders such as Alzheimer's disease and schizophrenia. Development is at the preclinical stage.

Polygodial is a sesquiterpene dialdehyde isolated from the leaves of certain peppers and related plants, that exhibits anti-inflammatory, antiallergic, antinociceptive, anticancer, antifungal and antimicrobial activities. Polygodial’s primary antifungal action is as a nonionic surfactant, disrupting the lipid-protein interface of integral proteins nonspecifically, denaturing their functional conformation. It is also likely that Polygodial permeates by passive diffusion across the plasma membrane, and once inside the cells may react with a variety of intracellular compounds. Polygodial is a component of the “hot taste” in peppery spices of traditional Japanese cuisine.

Pamoic acid, also called embonic acid, is a naphthoic acid derivative, used as a counter ion of a drug compound to increase the solubility of the drug in water. Pamoic acid has agonist activity for the orphan G protein-coupled receptor GPR35 by which it activates ERK and beta-arrestin2, and causes antinociceptive activity. Although (like other drug salts) it has been considered an inactive compound by the FDA.

SDZ-WAG-994 is a potent and selective A1 receptor agonist, discovered by Sandoz. SDZ-WAG-994 was able to induce a dose-related and sustained fall in blood pressure and heart rate in spontaneously hypertensive rats. The compound was investigated in patients with heart failure symptoms and moderate left ventricular systolic dysfunction, where it produced no effect. In patients with patients with permanent atrial fibrillation, SDZ-WAG-994 was able to limit the increase in mean heart rate during exercise. The compound was also tested for treatment of postoperative dental pain, but for all efficacy measures, SDZ-WAG-994 was not significantly different from placebo.