Alitame [l-α-aspartyl-N-(2,2,4,4-tetramethyl-3-thioethanyl)-d-alaninamide] is an amino acid-based sweetener developed by Pfizer Central Research from l-aspartic acid, d-alanine, and 2,2,4,4-tetraethylthioethanyl amine. A terminal amide group instead of the methyl ester constituent of aspartame was used to improve the hydrolytic stability. The incorporation of d-alanine as a second amino acid in place of l-phenylalanine has resulted in optimum sweetness. The increased steric and lipophilic bulk on a small ring with a sulfur derivative has provided a very sweet product and good taste qualities. Alitame is noncariogenic. From an oral intake, 7–22% is unabsorbed and excreted in the feces. The remainder is hydrolyzed to aspartic acid and alanine amide. The aspartic acid is normally metabolized, and the alanine amide is excreted in the urine as a sulfoxide isomer, sulfone, or conjugated with glucuronic acid. U.S. Food and Drug Administration has approved alitame for use as per acceptable daily intake (ADI) value.

Quadazocine is a substituted hexahydro-2,6-methano-3-benzazocine patented by Sterling Drug Inc. as analgesics and narcotic antagonist. Quadazocine is a potent antagonist of μ opioid receptor, less potent antagonist of κ and δ opioid receptors. In monkeys for whom responding was reinforced by food delivery, quadazocine blocks the rate-decreasing effects of the µ-agonists alfentanil and fentanyl with greater potency than it blocked the rate-decreasing effects of the κ-agonists U69,593

Amiterol, a phenethylamine derivative, is an oral anti-asthma drug (bronchodilator).

Menarini was developing oral nepadutant (MEN 11420), a potent and selective tachykinin neurokinin-2 receptor antagonist, for the treatment of infant colic. Nepadutant has been used in trials studying the treatment of colic, infantile colic, and infantile functional gastrointestinal disorders. MEN 11420 is a glycosylated derivative of the potent, selective, conformationally-constrained tachykinin NK2 receptor antagonist MEN 10627. MEN 11420 competitively bound with high affinity to the human NK2 receptor stably transfected in CHO cells, displacing radiolabelled [125I]-neurokinin A and [3H]-SR 48968 with Ki values of 2.5+/-0.7 nM (n = 6) and 2.6+/-0.4 nM (n = 3), respectively.

Dagapamil is a calcium-channel blocker, discovered by BASF. The compound is claimed to have antihypertensive, antiarrhythmic, cardioprotective, antiallergic and platelet aggregation-inhibiting action in animal models.

Lirexapride serotonin 5-HT4 receptor and dopamine D2 receptor agonists. It had been in phase II clinical trials for the treatment of irritable bowel syndrome. However, this research has been discontinued.

Lexacalcitol (KH1060) is over 100 times more active than 1alpha,25-dihydroxyvitamin D3 and is of potential interest in the treatment of psoriasis and other diseases characterized by accelerated cell growth and T lymphocyte activation, which was studied in the clinical trial. KH1060 also prevents type I diabetes in the preclinical investigation without significant effects on calcium or bone metabolism. In addition also was shown that neuroblastoma (NB) cell lines were more susceptible to growth inhibition by KH1060, suggesting its possible use in NB to potentiate the action of retinoids, which are in clinical use for this disease. The underlying biochemical reasons for the increased biological activity of KH1060 are unknown, but it can include 1) metabolic considerations in addition to explanations based upon 2) enhanced stability of KH1060-liganded transcriptional complexes.

Lobuprofen is an ester type analgesic, in which the acid moiety (ibuprofen) has peripheral analgesic activity and the alcohol moiety (mCPPol) has central analgesic activity.

Clocinizine is an antihistamine derivative of diphenylmethylpiperazine. Clocinizine is a competitive and reversible H1 receptor antagonist. The drug is marketed in Spain under tradename Senioral in combination with phenylpropanolamine for temporary relief of nasal congestion in colds, rhinitis, and sinusitis.

FIGOPITANT is a tachykinin NK1 receptor antagonist. It can inhibit scratching behavior in an atopic dermatitis model. It is under investigation in clinical trials to obtain preliminary pharmacokinetics data and information about FIGOPITANT safety and tolerability in healthy volunteers.