Butocrolol amino alcohol derivative with β-adrenolytic, antiarrhythmic, and local anesthetic properties having sympatholytic and antiarrhythmic effects comparable to those of propranolol, but with lower local anesthetic effects.

Doxaminol is a recently developed beta-sympathomimetic agent, which has shown promising positive inotropic activity in experimental animal models. It is a dibenzoxepine derivative. In normal volunteers, doxaminol exhibits effects on noninvasive cardiological indices similar to those observed after cardiac glycosides. After single-dose application of doxaminol in cases of congestive heart failure, cardiac output and stroke volume increased, heart rate increased slightly, pulmonary and systemic arterial pressure remained constant, and peripheral vascular resistance decreased. No arrhythmias appeared, but one patient suffered an attack of angina.

Metiprenaline was developed as a bronchodilator. Information about the current use of this compound is not available.

Colterol is a beta-2 adrenoreceptor agonist. Bitolterol, a diester prodrug of colterol, was marketed by Elan Pharmaceuticals for the treatment of reversible bronchospasm associated with asthma or chronic obstructive pulmonary diseases.

Rafabegron (also known as TAK-677 ) is an indole derivative patented by Dainippon Pharmaceutical Co., Ltd., as antidiabetics and antiobesity agent. Rafabegron asts as beta3-adrenergic agonist. In preclinical studies Rafabegron reduced the total weight of white adipose tissues by reducing the size of the adipocytes, an effect associated with the normalization of tumor necrosis factor-alpha and leptin expression levels in micce. The levels of uncoupling protein (UCP)-1 mRNA in brown adipose tissue were increased threefold. Rafabegron caused a marked increase (20- to 80-fold) in the expression of UCP-1 in white adipose tissues. In clinical trials. Rafabegron has no effect on 24-h respiratory quotient or fat oxidation but does slightly increase 24-h energy expenditure at the highest dose. The acute studies showed large interindividual variability in plasma concentrations of Rafabegron indicating some possible problems with bioavailability and therefore efficacy. Based on these data further development was discontinued.

Neraminol is a beta-adrenergic blocker.

Nadoxolol is a beta-adrenergic blocking agent and an antihypertensive drug.

Levisoprenaline (l-isoproterenol) is beta1- and beta2-adrenoreceptor agonist. In Japan, continuous inhalation of levisoprenaline is a recommended treatment for pediatric patients with acute severe exacerbation. Compared with salbutamol, l-isoproterenol reduced modified pulmonary index score more rapidly. But in most countries do not recommend continuous inhalation of l-isoproterenol to treat pediatric patients with acute severe exacerbation of asthma due to worsening asthma control. Levisoprenaline was used to cause experimental chronic heart failure in rats.

FIBRACILLIN is a semisynthetic antibacterial agent.

Faropenem medoxomil is an ester prodrug derivative of the beta-lactam antibiotic faropenem. The prodrug form of faropenem offers dramatically improved oral bioavailability and leads to higher systemic concentrations of the drug. Faropenem medoxomil is a broad-spectrum antibiotic that is highly resistant to beta-lactamase degradation. It was under development for the treatment of acute bacterial sinusitis, community-acquired pneumonia, acute exacerbation of chronic bronchitis, and uncomplicated skin and skin structure infections.