| 摘要 |
FIELD: amino acids, biochemistry. SUBSTANCE: invention relates to new crystals of N-[N-(3,3-dimethylbutyl)-L-alpha-aspartyl] -L-phenylalanine methyl ester showing characteristic peaks in X-ray diffraction spectra, at least, at diffraction angles (2theta, CuKalpha-radiation) equal to 7,1°, 19,8°, 17,3° and 17,7°. Invention describes also method for preparing such crystals that involves drying crystals of N-[N- (3,3-dimethylbutyl)-L-alpha-aspartyl]-L-phenylalanine methyl ester with characteristic peaks in their X-ray diffraction spectra, at least, bat diffraction angles (2theta, CuKalpha-radiation) equal to 6,0°, 24,8°, 8,2° and 16,5°, until water content in crystals will not reduce to less 3 weight %. Invention describes also granules of new crystals of N-[N-(3,3- dimethylbutyl)-L-alpha-aspartyl] -L-phenylalanine methyl ester exhibiting average size of particles in the range 100-1400 mcm. EFFECT: improved preparing method, enhanced solubility of sweetening agent. 4 cl, 2 dwg, 2 ex |
