The MDMA-related compounds identified are 3,4-methylenedioxyamphetamine, 3,4-methylenedioxyethylamphetamine, N-methyl-1-(3,4-methylenedioxyphenyl)-2-butamine, N-methyl-1-(3,4-methylenedioxyphenyl)-3-butamine, and 3,4-methylenedioxydimethylamphetamine. The procedure used involved thin-layer chromatography with fluorescence detection. The compounds identified form fluorophores on the developing plate following spraying with a reagent that consisted of sodium hypochlorite, potassium hexacyanoferrate, and sodium hydroxide and heating for 3 minutes at 100°C. Blue fluorescent spots were observed under ultraviolet light in a wavelength range of 250-400 nm. The detection limits for MDMA and the aforementioned compounds were 50 ng. The detailed descriptions of materials and methods address reagents, analytical instrumentation, gas chromatography-mass spectrometry, test compound treatment, thin-layer chromatography, and urine sample treatment. 5 figures, 2 tables, and 20 references