Glycine hispida Moench. (soybean) is an agricultural crop used in animal husbandry, foodstuffs, the medical industry, and technology. We studied several varieties of soybean grown in Khar'kov province and showed the presence of several groups of biologically active substances; the pharmacological complex obtained from the epigeal part revealed hypoglycemic activity. By chromatography on Filtrak FNI2 paper and column chromatography, 17 amino acids were detected and identified, and their percentage amounts were determined (valine 0.61%; glycine and threonine 0.40%; leucine 0.35%; aspartic and glutamic acids 0.33%; serine 0.30%; alanine and arginine 0.22%; isoleucine 0.19%; methionine 0.16%; phenylalanine, histidine, and lysine 0.13%; cystine 0.06%; with high proline and low tyrosine content). Additionally, a substance isolated from the complex preparation via polyamide column chromatography was identified as 5-ureidohydantoin (allantoin) based on its elementary composition, comparison with an authentic sample, and UV, IR, and PMR spectra.