| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing a neuraminic acid derivative, and to provide a high-purity neuraminic acid derivative.SOLUTION: There is provided a compound having formula (I), in which the content of a compound having formula (VII) [where Rrepresents a C-Calkyl group, Rrepresents a C-Calkyl group, and Ac represents an acetyl group] is 0.5 wt.% or less [wherein the compound having the formula (I) may contain a compound having formula (II)], or a pharmacologically acceptable salt thereof.</p> |
