| 摘要 |
The present invention provides crystals of an oligosaccharide useful, for example, as raw materials for or as intermediates of health foods, pharmaceutical compositions, cosmetics, etc. and a process for producing crystals of an oligosaccharide which is suitable for large-scale synthesis or industrialization. That is, the present invention provides a process for producing crystals of an oligosaccharide comprising three or more monosaccharide residues which comprises adding an aqueous solution containing the oligosaccharide comprising three or more monosaccharide residues to a water-miscible organic solvent; a process for producing crystals of an oligosaccharide which comprises adding an aqueous solution containing an oligosaccharide represented by general formula (I): [wherein Gal represents galactose; Glc represents glucose; R<1 >represents a monosaccharide residue, an amino sugar residue, or a derivative of the monosaccharide residue or the amino sugar residue; R<2>, R<3 >and R<4>, which may be the same or different, each represent a monosaccharide residue, an amino sugar residue, a derivative of the monosaccharide residue or the amino sugar residue, -X(-Y)- (wherein X and Y, which may be the same or different, each represent a monosaccharide residue, an amino sugar residue, or a derivative of the monosaccharide residue or the amino sugar residue) or a single bond; and R<5 >represents a hydrogen atom, a monosaccharide residue, an amino sugar residue, or a derivative of the monosaccharide residue or the amino sugar residue] to a water-miscible organic solvent; and crystals of an oligosaccharide represented by the above general formula (I).
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