(d) By inclusion of the 2-amino nitrogen atom in a cyclic structure. Examples of substituted cathinones include, but are not limited to, methylone (3,4-methylenedioxymethcathinone), MDPV (3,4-methylenedioxypyrovalerone), mephedrone (4-methylmethcathinone), 4-methoxymethcathinone, 4-fluoromethcathinone, 3-fluoromethcathinone, Pentedrone (2-(methylamino)-1-phenyl-1-pentanone), pentylone (1-(1,3-benzodioxol-5-yl)-2-(methylamino)-1-pentanone), 2-(1-pyrrolidinyl)-1-(4-methylphenyl)-1-propanone, alpha-PVP (1-phenyl-2-(1-pyrrodinyl)-1-pentanone), cathinone (2-amino-1-phenyl-1-propanone), and methcathinone (2-(methylamino)-propiophenone).
Detection of halotestin and other such illegal anabolic steroids in sports is achieved by GS-MS identification of urinary excreted anabolic steroids and their metabolites. In a test for halotestin, a dry residue obtained from a urine sample is dissolved in dimethylformamide and a sulfur trioxide-pyridine complex and is heated with 1% potassium carbonate solution. Halotestin and many of its metabolites contain two polar hydroxyl groups, leading to intermolecular hydrogen bonding that increases their boiling point and reduces volatility. In order to attain a gaseous sample for GC-MS, the products of hydrolysis are extracted, dissolved in methanol and derivatised to form volatile trimethylsilyl (TMS) esters by adding N -methyl- N -trimethylsilyl-trifluoroacetamide (MSTFA) and trimethylsilylimidazole (TMSImi). 
Antinuclear Antibody Screen (ANA); Anti Strptolysin-O (ASO); Calcium (Ca); Chem 6 [Blood Urea Nitrogen (BUN); Creatinine; Electrolytes [ Carbon Dioxide (CO2); Chloride (CL); Potassium (K); Sodium (Na) ]; Complete Blood Count [ Automated Differential; Hematocrit (Hct); Hemoglobin (Hgb); Mean Corpuscular Hemoglobin (MCH); Mean Corpuscular Hemoglobin Concentration (MCHC); Mean Corpuscular Volume (MCV); Platelet (PLT); Red Blood Cell Count (RBC); Red Cell Distribution Width Standard Deviation (RDWSD); Red Cell Distribution Width Coefficient Variation (RDWCV); White Blood Cell Count (WBC)] ; C-Reactive Protein (CRP); Creatine Kinase (CK); Epstein-Barr Virus Basic Panel [Epstein-Barr Virus Antibody IgG; Epstein-Barr Virus Antibody IgM] ; Estrogen, Total; Glucose Random; HLA-B27 Antigen; Insulin - Like Growth Factor 1 (IGF-1 / Somatomedin C); Magnesium (Mg); Parathyroid Hormones Intact (PTH Intact); Progesterone; Protein Electrophoresis; Rheumatoid Factor (RF); Sedimentation Rate (ESR); Testosterone, Total; Thyroid Profile with TSH [Free Thyroxine Index (FTI); T3 Uptake; Thyroid Stimulated Hormone (TSH); Thyroxine Total (T4)]; Uric Acid