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Salkowski test can also be used to test the presence of indoles (crystalline alkaloids that are a degradation products of proteins, containing tryptophan [10]). In such cases a sample is treated with nitric acid and 2% solution of potassium nitrite , with positive reaction being shown by presence of red colour.
Anabolic steroid § Comparison of AAS; Template:Relative affinities of estrogens for steroid hormone receptors and blood proteins; Template:Affinities of estrogen receptor ligands for the ERα and ERβ; Template:Pharmacodynamics of progestogens
The above photo shows the positive results of the number 2 Marquis reagent presumptive drug test when used with a sample of opium. It is the primary presumptive test used in Ecstasy reagent testing kits. It can also be used to test for such substances as opiates (e.g. codeine, heroin), and phenethylamines (e.g. 2C-B, mescaline).
This is a list of androgens/anabolic steroids (AAS) or testosterone derivatives. Androgen esters are mostly not included in this list. The major classes of testosterone derivatives include the following (as well as combinations thereof):
The four testosterone esters are as follows; . 30 mg testosterone propionate [1]; 60 mg testosterone phenylpropionate [1]; 60 mg testosterone isocaproate [1]; 100 mg testosterone decanoate [1]
Structural properties of major testosterone esters; Androgen Structure Ester Relative mol. weight Relative T content b logP c; Position(s) Moiet(ies) Type Length a; Testosterone – – – – 1.00
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Epitestosterone, or isotestosterone, also known as 17α-testosterone or as androst-4-en-17α-ol-3-one, is an endogenous steroid and an epimer of the androgen sex hormone testosterone. It is a weak competitive antagonist of the androgen receptor (AR) and a potent 5α-reductase inhibitor .