18F-FET (18F-Fluoroethyl-L-tyrosine) is a radiolabelled amino acid. It penetrates the blood-brain barrier by a specific amino acid transport system. In the brain, it is taken up into upregulated tumoral cells but not incorporated into proteins. It is used as a biomarker for positron emission tomography for imaging brain tumors, where it has higher specificity than 18F-FDG.

Felbinac ethyl ester or ethyl 4-biphenylyl acetate (EBA) is a small molecule drug class of analgesics, antipyretics, nonsteroidal anti-inflammatories, phenylacetates. It is a prodrug of non-steroidal anti-inflammatory drug 4-biphenylylacetic acid (BPAA)- an active metabolite of EBA. The use of EBA instead of free BPAA in the form of lipid microspheres or solubilized in cyclodextrins enhances the anti-inflammatory effects of biphenylylacetic acid. Solubilization of EBA in hydroxypropyl-beta-cyclodextrin (HP-beta-CyD) increases absorption and localized activation of the prodrug metabolic process in the epidermis when applied topically to the skin of rats and mice. Felbinac ethyl ester is a prostaglandin inhibitor. When intravenously administered felbinac ethyl ester incorporated in lipid microsphere at the onset of stone pain or vesical urgency in 54 patients with pain from urinary tract stones and 32 with vesical urgency after an operation on bladder or prostate be was found to be a useful drug for controlling stone pain and vesical urgency since an immediate effect, long durability and high response rates were obtained without severe side affects.

Diethyl sulfide, a food flavor ingredient, possesses garlic-like odor. It is used as a solvent and to make other chemicals. Diethyl sulfide can irritate the skin and eyes, breathing of this compound can irritate the nose and throat.

Armin is irreversible cholinesterase inhibitor. It acts considerably longer and stronger than reversible cholinesterase inhibitors. It is used for glaucoma treatment. Armin might be used in combination with other antiglaucoma drugs. Known adverse effects are: hypersalivation, sweating, dyspepsia, frequent urination, blurred vision, headache, dizziness, twitching of the tongue and skeletal muscles, nausea, vomiting.

Ethyl maleate is supposed to be a toxic agent. Its administration induced acute aflatoxicosis in goats. Ethyl maleate is also used as a cross-linking agent for the synthesis of polymers.

Ethyl loflazepate (Lof) has been used widely as a sedative and anxiolytic agent for nearly 20 years. Ethyl loflazepate was designed to be a prodrug for descarboxyloflazepate, its active metabolite. It is the active metabolite which is responsible for most of the pharmacological effects rather than ethyl loflazepate. The main metabolites of ethyl loflazepate are descarbethoxyloflazepate, loflazepate and 3-ydroxydescarbethoxyloflazepate which are the benzodiazepine receptor agonists. Ethyl loflazeplate is commercialized in Mexico, under the trade name Victan. It is officially approved for the following conditions Anxiety: Post-trauma anxiety; Anxiety associated with severe neuropathic pain; Generalized anxiety disorder (GAD); Panic attack; Delirium tremens. It possesses anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties. Accumulation of the active metabolites of ethyl loflazepate are not affected by those with renal failure or impairment. The symptoms of an overdose of ethyl loflazepate include sleepiness, agitation and ataxia. Hypotonia may also occur in severe cases. These symptoms occur much more frequently and severely in children. High doses of the antidepressant fluvoxamine may potentiate the adverse effects of ethyl loflazepate.

Ethyl Piperidinoacetylaminobenzoate is usually used to treat stomach pain/nausea/gastric discomfort accompanied with gastritis.