U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

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Showing 50091 - 50100 of 55039 results

Status:
Investigational
Source:
INN:sparfosic acid
Source URL:

Class (Stereo):
CHEMICAL (ABSOLUTE)

Sparfosate (PALA) is a stable transition state analogue for an aspartate transcarbamylase- cartalyzed reaction with antineoplastic activity. PALA is a potent inhibitor of aspartate transcarbamylase (Ki about 10(-8) M for ACTases of various origins), which in whole cells blocks the de novo synthesis of pyrimidines. Thus PALA inhibits de novo pyrimidine biosynthesis and increases the extent to which fluorouracil metabolites are incorporated into RNA. In vivo, low doses of PALA inhibit whole body pyrimidine synthesis. While this action is cytotoxic in vitro, extensive human testing demonstrates that PALA alone is devoid of selective antitumor activity. Interest in the therapeutic action of PALA derives from the demonstration that its action potentiates the cytotoxicity of several cytotoxic drugs, notably 5-fluorouracil (5-FU). Development of Sparfosate for cancer and Hepatitis B treatment is assumed to have been discontinued.
Status:
Investigational
Source:
INN:guanoxyfen
Source URL:

Class (Stereo):
CHEMICAL (ACHIRAL)

Guanoxyfen sulfate is an antidepressant, antihypertensive. Guanoxyfen sulfate is an inhibitor of vasoconstrictor responses to sympathetic nerve stimulation. It could potentiate the actions of adrenaline and noradrenaline. It also could increase the blood glucose concentration and decrease the appetite.
Status:
Investigational
Source:
INN:tiomergine
Source URL:

Class (Stereo):
CHEMICAL (ABSOLUTE)

Tiomergine is an ergot alkaloid derivative. It is the agonist of the postulated presynaptic dopamine receptor. Tiomergine is the antiparkinsonian agent. Tiomergine modified brain glucose metabolism in a way similar to the neuroleptics but different from postsynaptic agonists. It was ineffective in the treatment of tardive dyskinesia.
Status:
Investigational
Source:
INN:ciclazindol [INN]
Source URL:

Class (Stereo):
CHEMICAL (RACEMIC)

Ciclazindol is an indole derivative and monoamine uptake inhibitor patented by pharmaceutical company John Wyeth and Brother Ltd. as an antidepressant. Besides that, Ciclazindol is effective anorectic agent, inducing weight loss in rats and man. Ciclazindol was shown to inhibit ATP-sensitive K+ (K(ATP)) channel currents and stimulate insulin secretion from CRI-G1 insulin-secreting cells. The inhibition of KATP channel currents by ciclazindol is unaffected by the removal of intracellular Mg2+ ions and after trypsinization of the cytoplasmic surface of excised patches, treatments known to abolish sulphonylurea sensitivity.
Status:
Investigational
Source:
INN:metoserpate
Source URL:

Class (Stereo):
CHEMICAL (ABSOLUTE)

Metoserpate (SU9064) is a sedative drug used in veterinary. PACITRAN (metoserpate hydrochloride) is indicated as a tranquilizer in stressed poultry.
Status:
Investigational
Source:
INN:dimesone [INN]
Source URL:

Class (Stereo):
CHEMICAL (ABSOLUTE)

Dimesone is a synthetic glucocorticoid with anti-inflammatory and anti-allergic activity.
Status:
Investigational
Source:
INN:somantadine
Source URL:

Class (Stereo):
CHEMICAL (ACHIRAL)

Somantadine, an adamantane derivative, is an antiviral agent. Somantadine was synthesized by Pennwalt and has been undergoing tests for the treatment of herpes virus for nearly five years.
Status:
Investigational
Source:
INN:oxilorphan
Source URL:

Class (Stereo):
CHEMICAL (ABSOLUTE)

Oxilorphan (also known as levo-BC-2605) was developed as a long-acting, narcotic antagonist that has agonist properties. Oxilorphan is a partial agonist at the kappa-opioid receptor and antagonist of the mu-opioid receptor. During clinical trials, oxilorphan had led to dysphoria, which combined with its hallucinogenic effects, serves to limit its clinical usefulness. As a result, many patients who experienced these side effects refused to take additional doses in clinical trials.
Status:
Investigational
Source:
INN:indolapril [INN]
Source URL:

Class (Stereo):
CHEMICAL (ABSOLUTE)


Conditions:

Indolapril (CI-907) is a new orally active prodrug of nonsulfhydryl angiotensin-converting enzyme (ACE) inhibitor, developed by Warner-Lambert/Parke-Davis Pharmaceutical Research for treating hypertension. Indolapril is epimer of trandolapril, well-known ACE inhibitor currently in the market for hypertension treatment. Indolapril (Monoester form) and it’s active component (diacid form) produced concentration related ACE inhibition in guinea-pig serum (IC50 for monoester -- 0.1 mkM and for diacid -- 2.6 nM). In isolated rabbit aortic rings and in rat and dog autonomic studies, Indolapril is highly specific in suppressing the contractile or pressor responses to angiotensin I. In two-kidney, one-clip Goldblatt hypertensive rats, single daily doses (0.03-30 mg/kg p.o.) produced dose-dependent decreases in blood pressure; 3 mg/kg lowered blood pressure to normotensive levels. In the spontaneously hypertensive rat, subacute administration of Indolapril produced the same decrease in blood pressure as that obtained in the renal hypertensive rat. In diuretic-pretreated renal hypertensive dogs, 10 mg/kg normalized blood pressure. For equivalent drops in blood pressure, heart rate increases were less in Indolapril than in enalapril-treated renal hypertensive dogs. No side effects were observed with CI-907 in any of the conscious animals. The antihypertensive response to Indolapril (0.03-1.0 mg/kg p.o.) was found to correlate with inhibition of vascular tissue ACE, but not plasma or brain ACE in two-kidney, one-clip renal hypertensive rats.
Status:
Investigational
Source:
INN:quinpirole [INN]
Source URL:

Class (Stereo):
CHEMICAL (ABSOLUTE)


Conditions:

Quinpirole (LY 171,555) is a psychoactive drug and research chemical which acts as a selective D2 and D3 receptor agonist. Quinpirole is the most widely used D2 agonist in in vivo and in vitro studies. Specific quinpirole binding in rat brain was saturable, and dependent on temperature, membrane concentration, sodium concentration and guanine nucleotides. Saturation analysis revealed high affinity binding characteristics (KD = 2.3 nM) which were confirmed by association-dissociation kinetics. The regional distribution of [3H]quinpirole binding sites roughly paralleled the distribution of [3H]spiperone binding sites, with greatest densities present in the striatum, nucleus accumbens and olfactory tubercles. A variety of drugs, most notably monoamine oxidase inhibitors (MAOls), inhibit the binding of [3H]quinpirole, but not [3H]spiperone or [3H](-)N-n-Propylnorapomorphine, in rat striatal membranes by a mechanism that does not appear to involve the enzymatic activity of MAO. Clinically antidepressant MAOIs exhibited selectivity between sites labeled by [3H]quinpirole and [3H]spiperone as did a number of structurally related propargylamines and N-acylethylenediamine derivatives and other drugs such as debrisoquin and phenylbiguanide. Quinpirole has been shown to increase locomotion and sniffing behavior in mice and induces compulsive behavior symptomatic of obsessive compulsive disorder in rats.

Showing 50091 - 50100 of 55039 results